Invasive Species Expanding Their Ranges 100x Faster Than Native Species, Study Finds

Native species are struggling to keep pace with invasive species in range expansion, which is important for adaptation and survival, a new study has found.

According to researchers, species need to be able to shift at least 3.25 kilometers per year to keep up with climate change. However, they found that native species are only moving at an average rate of around 1.74 kilometers per year.

In general, invasive species are spreading 100 times faster than native plants and animals, and even some that seem more sedentary are moving at least three times faster than native species, according to the study, published in the journal Annual Reviews of Ecology, Evolution and Systematics.

“We’ve known for a long time that native species aren’t moving nearly fast enough, but there are still some that are able to keep up,” Bethany Bradley, lead author and professor of environmental conservation at University of Massachusetts Amherst, told EcoWatch. “We hadn’t necessarily looked at non-native species specifically as a group of whether they were able to keep up or not. I think this analysis basically says that not only are non-native species really able to keep up, but the reason behind it is because we’re moving them around. They’re non-native species for a reason — because humans are moving them.”

The study revealed that invasive species were moving at a rate of around 35 kilometers per year without human actions. But when factoring in the ways humans contribute to the spread of invasive species, the shift can happen at a rate of around 1,883 kilometers per year, or around 1,000 times faster than native plants and animals.

To compare how human actions drove range expansion, the researchers analyzed data for 249 native species, 242 non-native species, and 192 non-native species introduced through human actions. For example, shipping containers or ships can spread invasive species, and the pets people keep can contribute to invasive species growth. Even hiking can contribute to spreading invasive plant seeds.

One challenge is a lack of regulations on invasive species. As Bradley explained, it can take a long time to establish policies that restrict the spread of invasive species through human actions, so these species can continue their expansion as humans continue moving them.

On the other hand, Bradley said that native species will actually need human intervention to help them adapt to climate change and the competition from non-native species.

“If we want native species to survive, then we have to choose there, too. We have to make an active choice to try to help,” Bradley told EcoWatch. “This is called assisted migration or managed relocation of trying to allow for native species to shift their ranges actively with climate change. That requires our help.”

Bradley recommended for gardeners to “not only think about native species so that you avoid introducing invasive species, but also think about native species because our gardens can serve as stepping stones to help those populations survive climate change,” and suggested using tools like Lady Bird Johnson Wildflower Center’s native plant website and the Missouri Botanical Garden website for finding native plants.

In a previous study, Bradley and colleagues found that horticulture, including plant nurseries, was contributing to the spread of invasive plant species. Bradley noted that while nurseries were not setting out to spread invasive species, some popular ornamental plants sold in nurseries can contribute to their rapid spread. 

As part of that study, the researchers compiled a list of regionally invasive plant species as well as alternative, native options to raise public awareness. 

For example, the list noted that pampas grass (Cortaderia selloana) is an invasive species that can outcompete native plants and disrupt wetland habitats. For those in the northeastern U.S. who want a similar look in their garden, the list recommended planting golden feather grass (Sorghastrum nutans) as a native alternative.

To help prevent the spread of invasive species other than plants, Bradley recommended people who enjoy boating to thoroughly wash their boats to minimize spreading aquatic invasive species and for people who keep pets like snakes, fish and lizards to prevent those pets from getting loose or avoid releasing them into the environment.

The U.S. Department of Agriculture has an interactive map resource on invasive species information and news by state for the public. In the U.S., some of the most invasive species include emerald ash borers, hemlock woolly adelgid, wild boars and domesticated cats.

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Massachusetts State Senate Passes Plastics Ban

A ban on single-use plastic items like bags and straws is closer to becoming reality in Massachusetts after the state Senate approved a broad bill addressing plastics last Thursday. The Senate passed the bill by 38-2.

The ban, which has now moved to the state House of Representatives, would ban plastic bags at retailers, charge a $0.10 fee per paper bag used and require straws and plastic utensils to be made available only by request. The $0.10 fee per paper bag would allocate 50% of the collected fee toward retailer expenses and the other 50% for environmental initiatives, South Coast Today reported.

The bill would also establish a recycling program for large plastic items, like car seats, according to a report from The Associated Press.

“This vital legislation is another step forward towards eradicating plastics, a top environmental offender, in our everyday life,” said Sen. Michael Rodrigues, chair of the Senate Committee on Ways and Means, as reported by The Associated Press.

In addition, the bill will make a previous executive order from Gov. Maura Healey, banning state agencies from buying single-use plastic bottles, into law. That executive order was signed in September 2023, PBS reported.

If the bill passes, it will make Massachusetts the 13th state to establish a plastics ban. The state already has many plastic restrictions in place locally, with around 70% of the population across over 160 towns and cities under bans on single-use plastic bags.

According to the Sierra Club, Massachusetts threw out about 900,000 tons of plastic in 2022 alone, and a ban on single-use plastics could help reduce the amount of plastic going to the state’s landfills each year.

In a report published in early 2024, researchers found that plastic bans, particularly bans on plastic bags, have made a big impact in the U.S. Bans in New Jersey, Philadelphia and Vermont — along with bans in Portland, Oregon and Santa Barbara, California — have cut single-use plastic bag consumption by around 6 billion bags per year.

“Today, state leaders have chosen to take a big step toward reducing waste and protecting our neighbors and local wildlife from the dangers of excessive plastic usage,” Jess Nahigian, state political director for Sierra Club Massachusetts, said in a statement. “Plastics harm our ecosystems and communities. Cutting down on plastics is a necessary step toward achieving our state climate goals and creating a more sustainable home for future generations of Massachusetts residents. This is an important and vital step in plastic reduction, and Sierra Club Massachusetts encourages the Massachusetts House to pass this bill.”

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Iberian Lynx Recovers From Endangered Species Status Following Conservation Efforts

The International Union for Conservation of Nature (IUCN) has changed the listing for the Iberian lynx species, or Lynx pardinus, from Endangered to Vulnerable in the organization’s Red List, a list detailing the extinction risk of species around the world.

Francisco Javier Salcedo Ortiz, coordinator of the LIFE Lynx-Connect project that led conservation efforts for the species, described the population rebound as “The greatest recovery of a cat species ever achieved through conservation” in a statement by IUCN.

The change listing follows more than 20 years of recovery efforts to save the Iberian lynx, which had only 62 mature individuals by 2001, CBS News reported. The species was threatened by human activity and habitat loss along with declines in its prey, European rabbits (Oryctolagus cuniculus). By 2005, the Iberian lynx habitat spanned just 449 square kilometers.

In response, conservationists worked to improve the species’ habitat, including restoring Mediterranean scrub and forest areas, minimizing deaths of the cats from human activities and boosting European rabbit populations in the lynx’s range. Conservationists worked with local communities to reduce lynx deaths from traffic collisions and poaching, CBS News reported.

According to IUCN, scientists also used breeding programs and translocations to improve genetic diversity within the species. More than 400 Iberian lynx have been reintroduced in Portugal and Spain as part of these efforts.

“There is still a lot of work to do to ensure that Iberian lynx populations survive and the species recovers throughout its indigenous range,” Ortiz said. “Looking ahead, there are plans to reintroduce the Iberian lynx to new sites in central and northern Spain.”

In 2022, there were 648 mature Iberian lynx. Today, IUCN estimated that there are more than 2,000 mature individuals, spanning a habitat range of around 3,320 square kilometers.

“The significant recovery of the Iberian lynx demonstrates that even the most threatened species can be brought back from the brink of extinction through committed, science-based conservation action and provides hope for those working to protect wildlife across the globe,” Sarah Durant, professor at the Zoological Society of London’s Institute of Zoology, said in a press release.

While IUCN has changed the status of the Iberian lynx from Endangered to Vulnerable, it also describes the species as Largely Depleted, which means the species will require ongoing conservation actions and protections.

In 2013, a study warned that the Iberian lynx could become extinct in the wild by the 2060s. Now, IUCN said that the species could fully recover in the next 100 years with continued actions toward conservation.

IUCN will publish a comprehensive Red List update for this year on June 27.

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Museum Exhibit Draws Parallels Between ‘Little Ice Age’ Resiliency and Modern Climate Crisis

As modern humans find ways to adapt and build resiliency to anthropogenic climate change, one art exhibition is looking to the past to uncover how the 17th century Dutch acclimated themselves to extreme weather.

The Getty Center, a museum in Los Angeles, opened an exhibition on May 28 titled On Thin Ice: Dutch Depictions of Extreme Weather, which features Dutch artists’ works from the 1600s. 

The Little Ice Age

The exhibition, on display through Sept. 1, explores the everyday resilience to the extreme weather during a time period nicknamed the “Little Ice Age.” According to the museum’s representatives, this time period consisted of particularly harsh winters as well as cooler-than-usual summers. 

While it wasn’t a massive ice age on a global scale, the Little Ice Age lasted hundreds of years, from around 1300 to 1850 and affected much of the Northern Hemisphere, particularly Europe. This was caused in part by volcanic activity and changing wind patterns and ocean currents, and it led to long winters, with frequent and heavy snowfall.

While the Dutch struggled, facing extreme weather such as powerful storms and flooding, historians have uncovered more and more evidence that the Dutch in particular were able to build resilient communities that helped provide food to disadvantaged families, improve infrastructure, further scientific advancements and more, according to an essay in Aeon.

Building Resiliency

While the Industrial Revolution — and the emissions that skyrocketed since — didn’t begin until the 18th century, long after the artworks in the On Thin Ice exhibition were created, humans today can still relate to how people throughout history adapted to more natural bouts of climate change and extreme weather, the exhibition suggests.

A sense of community and innovation helped people of the past adapt to the extreme weather they were facing. In the Netherlands, this looked like adapting to frozen waterways that remained icy into spring with improved icebreaking tools and greasing ships and strengthening ship hulls to combat icy waters, as The Washington Post reported. If the ice couldn’t break down, communities would pivot and host ice fairs to attract visitors and generate income. During this time, the Dutch also invested in charities and established insurance policies to offer more protections against the many things that could go wrong in the face of extreme weather.

The Works on Display

The Getty Center exhibition includes around 40 drawings and paintings by Dutch artists, with a highlight on works by painter Hendrick Avercamp. 

The entrance to the exhibition reads, in part, “In the seventeenth century the Dutch Republic experienced a period of political stability, economic prosperity, and great technological advancement. A complex system of levees, canals, and windmills protected the Netherlands from the encroaching sea and transformed marshland into highly fertile tracts of farmland.”

“Astute observers and critics of their time, artists underscored the fundamental uncertainty of climate conditions, and their works offer opportunities to reflect on our current environmental crises,” the exhibition introduction continues.

One painting by Avercamp, “Winter Landscape With Skaters,” was painted during one of the harshest winters of the time period. You can see moored boats partially frozen in a thick sheet of ice, and some people in the foreground standing near a large hold for ice fishing. Some people are walking together, some people are playing games on ice and others are hauling goods.

“Winter Landscape With Skaters” by Hendrick Avercamp. Rijksmuseum, Amsterdam / public domain

Another work from Avercamp, “A Winter Scene with Two Gentlemen Playing Colf,” shows people enjoying time outdoors, whether they’re just standing on ice talking to one another or sledding and skating. Two people at the foreground of the painting engage in a game of colf, a Dutch game with similarities to golf and hockey.

“A Winter Scene with Two Gentlemen Playing Colf” by Hendrick Avercamp. Getty Museum

Another work, “January” by Jan van de Velde, shows a community coming together for merriment, like skating on a frozen lake and walking in groups on an outdoor path, despite the cold temperatures. 

“January” by Jan van de Velde. UCLA Grunwald Center for the Graphic Arts,
Hammer Museum, Rudolf L. Baumfeld Bequest

The Dutch were able to prosper economically during the Little Ice Age, in part by providing goods and supplies to other countries. We can get a glimpse of their work amid freezing temperatures in “Winter Landscape,” an artwork by Nicolaes Molenaer. In the piece, people are depicted moving goods across ice, which must be very thick and frozen to hold the weight of horse-drawn carriages moving supplies. People in the drawing are bundled in coats and hats.

“Winter Landscape” by Nicolaes Molenaer. National Museum in Warsaw / Wilanów Palace / public domain

In “A Winter Scene” by Hendrik Meyer, there are displays of harsh winter and hard work, yet comfort and warmth. Snow is piled up on a roof and the surrounding landscape, and workers are chopping and hauling wood and transporting people in carriages. People have flushed cheeks, and a mother and child stand in the doorway of a home with smoke blowing out of the snowy chimney.

“A Winter Scene” by Hendrik Meyer. Getty Museum

On the opposite site of “A Winter Scene,” the exhibition includes another work by Hendrik Meyer titled “A Summer Scene.” Here, people are tending to animals and agricultural work. According to the Getty Center, details like animals in the shade, dogs drinking water, and women in their bare feet may indicate hot weather. In the far distance, the viewer can spot windmills.

“A Summer Scene” by Hendrik Meyer. Getty Museum

These are just a handful of works on display in the exhibition, but they collectively show a range of families and strangers who are both working hard for the community and indulging in leisure time and recreation, despite facing extreme weather.

“During a period of extended cold in the 17th century, a number of remarkable Dutch artists created a genre of paintings and drawings that capture the icy landscapes and extreme living conditions of climate gone awry,” Timothy Potts, Maria Hummer-Tuttle and Robert Tuttle Director of the Getty Museum, said in a press release. “There are obvious resonances with the opposite extreme we face today in the rising temperatures across much of the globe.”

Looking to the Future

The old adage goes that history repeats itself, and while the current climate crisis often comes with unprecedented events, this art exhibition reveals some hope in how humans can work together to adapt to climate change.

During the Little Ice Age, the Dutch, as depicted in the artworks, became important purveyors of goods to other countries, dedicated themselves to hard work for community betterment, and even participated extensively in charitable acts, as explained by Anne McCants, a history professor at the Massachusetts Institute of Technology. They adapted so well that their advancements during the Little Ice Age led to the Dutch Golden Age.

Rather than be passive bystanders to the worst impacts of the climate crisis, humans today can and should collaborate to work on slowing climate change and undoing some of the damage we’ve done to the planet. Like the people of the past, we’ll need to work together and tap into innovation and ingenuity to overcome the struggles we face.

“Today’s global climate crisis is an ongoing issue affecting current and future generations, and often inspiring the work of contemporary artists. This exhibition offers a glimpse at how Dutch artists in 1600s presented such topics,” said Stephanie Schrader, curator of drawings at the Getty Museum. “Not only will it give visitors a better understanding of the past, but it will also provide an example of how adaptation is our only hope for the future.”

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Air Pollution Linked to 2,000 Child Deaths per Day Globally

The State of Global Air Report 2024 has revealed that an average of around 2,000 children, aged 5 and younger, are dying every day from poor air quality.

The study, by the Health Effects Institute (HEI) in partnership with UNICEF, linked 8.1 million deaths of people of all ages in 2021 to air pollution. The report determined that in 2021, around 709,000 deaths of children under 5 years could be connected to air pollution, making poor air quality responsible for around 15% of global deaths of children 5 years and younger.

“We hope our State of Global Air report provides both the information and the inspiration for change,” HEI President Dr. Elena Craft said in a press release. “Air pollution has enormous implications for health. We know that improving air quality and global public health is practical and achievable.”

As The Guardian reported, air pollution is now the second biggest cause of death globally, behind high blood pressure. Air pollution has overtaken smoking and other tobacco use. For children, poor air quality is the No. 2 killer behind malnutrition.

“Despite progress in maternal and child health, every day almost 2,000 children under 5 years die because of health impacts linked to air pollution,” said UNICEF Deputy Executive Director Kitty van der Heijden. “Our inaction is having profound effects on the next generation, with lifelong health and wellbeing impacts. The global urgency is undeniable. It is imperative governments and businesses consider these estimates and locally available data and use it to inform meaningful, child-focused action to reduce air pollution and protect children’s health.” 

According to the report, fine particulate matter pollutants, or PM2.5, was responsible for more than 90% of air pollution-related global deaths in 2021. Fine particulates can enter the lungs and blood stream, increasing risk of lung cancer, heart disease and stroke. Sources of PM2.5 include fossil fuel plants, industrial facilities, transportation, wildfires and even fuel combustion at home for activities like cooking and heating.

This year’s State of Global Air Report highlighted the deadly impacts of long-term exposure to ground-level ozone, which was linked to around 489,518 global deaths in 2021. In the U.S., ground-level ozone exposure contributed to around 14,000 chronic obstructive pulmonary disease (COPD), more than the ozone-related COPD deaths in other high-income countries.

For the first time in the report’s history, the 2024 version includes data on nitrogen dioxide exposure. As HEI explained, nitrogen dioxide is a common pollutant from vehicle exhaust. It can also be emitted by fossil fuel and industrial plants. Nitrogen dioxide can contribute to asthma and other respiratory conditions, the report noted, and can also contribute to worsening ozone and fine particulate pollution.

Despite these findings, the report highlighted some good news, including that the disease burden from air pollution exposure in children has declined by around 35% from 2010 to 2021 as household air pollution has declined. Further, the air pollution-related death rate in children under 5 years has declined 53% since 2000, in part thanks to clean energy developments.

But more actions are needed to reduce air pollution and improve health outcomes for people around the world.

“This new report offers a stark reminder of the significant impacts air pollution has on human health, with far too much of the burden borne by young children, older populations, and low- and middle-income countries,” Dr. Pallavi Pant, HEI’s Head of Global Health at HEI, said in a statement. “This points sharply at an opportunity for cities and countries to consider air quality and air pollution as high-risk factors when developing health policies and other noncommunicable disease prevention and control programs.” 

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Vermont Becomes Second State to Ban Bee-Killing Neonic Pesticides

After the Vermont state legislature overrode a veto from Governor Phil Scott, Vermont has now become the second state in the U.S. to ban neonicotinoids, or neonics, a type of pesticide that is particularly harmful to bees. The ban comes at the start of Pollinator Week.

The bill was vetoed by Governor Scott on May 20, 2024, but the Vermont House of Representatives and Senate voted to override the governor’s veto on June 17.

“This bill unfairly targets dairy farmers reliant on corn crops and will harm farmers without achieving its goals for pollinators,” Governor Scott said of the bill. “For these reasons I cannot sign it into law.”

Neonics are common in insecticides for agricultural and lawncare use, but they are neurotoxic. These chemicals are harmful and even deadly to bees and other pollinators. According to the Natural Resources Defense Council (NRDC), neonics, which were first developed in the 1990s, are now the most common insecticide class in the U.S.

A study published in 2019 found that since the rise in the use of neonics, agriculture had become 48 times more toxic to insects by 2014. The study further determined that neonics made up about 99% of total acute oral toxicity loading of insecticides in 2014.

As NRDC explained, neonics are meant for targeted pesticide use but are often used more broadly, including for corn crops. The organization reported that each conventional corn seed has enough neonics in its coating to kill around 250,000 bees, plus these chemicals can leach into soil and groundwater.

Now, Vermont is minimizing the use of neonics by requiring agronomists to provide written exemptions, or a type of prescription as described by NRDC, in order to plant crop seeds coated with neonics. The state follows New York in establishing restrictions on neonics. As reported by the National Caucus of Environmental Legislators, four other states (Arizona, Connecticut, Hawaii and Washington) have introduced legislation restricting neonics.

Vermont’s restrictions are similar to restrictions set in Québec, which were initially met with concerns over crop yields. However, the neonics restrictions in Canada brought the use of neonics for corn and soybean crops down to around 0.5%, leading to a decline in the amount of neonics contaminating waterways without any impact on crop yields, Times Union reported.

Following the overridden veto, the bill is slated to take effect beginning Jan. 1, 2029, VT Digger reported.

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Last Wild Horse Species on Earth Saved From Extinction and Returned to Native Habitat

The endangered Przewalski’s horse (Equus ferus przewalskii) is the last wild horse species on Earth, meaning a type of wild horse that is not a descendent of domesticated horses. But in the 1960s, this horse became extinct in the wild. Now, through a managed breeding and care program by the Prague Zoo, Przewalski’s horse has been returned to Kazakhstan’s Golden Steppe for the first time in at least two centuries.

In early June 2024, two Czech Army CASA aircrafts carried a total of seven Przewalski’s horses to Golden Steppe, an area of open grasslands. The first aircraft with three horses landed on June 4, according to a press release from the Prague Zoo.

“After hundreds of years, first Przewalski’s horses have returned to the steppes of central Kazakhstan,” Miroslav Bobek, the director of the Prague Zoo, said in a press release. “We still have a long way to go, but this was a historic moment. The sight of Zeta II running off into the steppe will never leave my memory.”

On June 6, the remaining four horses were transferred to the grasslands. But the project did not go as smoothly as hoped, as eight horses in total were originally planned for the trip. But in the first batch of horses, one horse named Pelle kept sitting in his crate, which the zoo noted could be dangerous for him during the long journey. Some technical difficulties also led to delays, but overall, the horses were transported safely, marking a successful project.

“This is an event of historical import: the seven ‘Przewalski’s’ that we transported here by two CASA planes represent the first individuals of this species in central Kazakhstan in hundreds of years,” Bobek said in an update. “With this double transport, we have taken a major step towards returning the last wild horse to another area where it was found in the past. Our goal is to slowly transport at least forty individuals here, so that a viable population can be set up. Hardly anything could be a better demonstration of the purpose of modern zoos than the Return of the Wild Horses.”

The horses will roam in an area spanning 80 hectares and will be closely monitored by researchers, EuroNews reported.

Przewalski’s horses were once abundant across Europe and Asia, but environmental changes and competition with livestock and humans led their habitat to shrink, the Smithsonian’s National Zoo & Conservation Biology Institute reported. Eventually, they became extinct in the wild. But reintroduction projects, like those led by Prague Zoo, have helped return the species to the wild at sites in Kazakhstan, Mongolia and China.

The San Diego Zoo and the San Diego Zoo Safari Park has also led a major breeding program for the species, with more than 157 Przewalski’s horses bred since 1969. According to the zoo, it sends the offspring to reintroduction programs and other zoos to help with species recovery.

As EuroNews reported, Prague Zoo is slated to transfer additional horses to Golden Steppe in 2025. In addition to the 40 total horses Prague Zoo plans to eventually reintroduce to Golden Steppe, the zoo is expected to send more Przewalski’s horses to Mongolia in two years.

“We are still responsible the fact this wild horse disappeared and now we can sort of reverse that, and give it back to nature,” Filip Mašek, spokesperson for Prague Zoo, told the BBC. “To sort of be these Noah’s Arks which have all these endangered species. If it’s possible — and sometimes it’s not — we should try and do everything to return them to their original environments.”

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Unusually Large Number of Whales Spotted, Including Multiple Endangered Species, off Northeast U.S. Coasts

The National Oceanic and Atmospheric Administration (NOAA) has reported 161 sightings of whales last month, representing seven different whale species. The sightings, recorded on May 25, took place off the northeastern U.S. Coasts, near Martha’s Vineyard and southeast of Nantucket. According to NOAA, the sightings included an unusually high number of whale species, particularly endangered whales.

The sightings don’t necessarily mean there were 161 individual whales, since some may have been counted multiple times, The Associated Press reported. But the recorded whale sightings were still a positive sign, especially considering the high numbers of endangered species observed.

The researchers observed 93 sei whales, which are considered endangered under the Endangered Species Act. As stated on the NOAA website, sei whales experienced major declines in the 19th and 20th centuries, when around 300,000 of these whales were hunted. This was one of the highest recorded concentrations of sei whales, The Associated Press reported.

Teri Frady, chief of research communications for the Northeast Fisheries Science Center under NOAA, said that seeing so many whales in this area around this time of year is not unheard of, but the researchers did not expect to find such a large number in one area at once, especially with such a variety of species.

“It is not unusual that there are a lot of whales in the area this time of year. But since we do not survey every day, or in the same areas every time we fly, catching such a large aggregation with such a variety of species on one of our flights is the exception rather than the rule,” Frady explained, as reported by The Associated Press.

In addition to the sei whales, researchers noted three sightings of the North Atlantic right whale, another endangered species, humpback whales, fin whales, minke whales, sperm whales and the rare sightings of two orcas, which are not as common in this area. One orca was observed with a tuna in its mouth.

Gib Brogan, campaign director at Oceana, told The Associated Press that the area where the whales were observed is “increasingly important as year-round core habitat for North Atlantic right whales and other large whale species,” but that it remains a risky place for whales. Brogan noted the U.S. needs to finalize legal protections to minimize risks of vessel strikes and fishing gear entanglements, two of the biggest threats to whales in the region.

The sightings in May follow the rare observations of a gray whale off the northeastern U.S. in March by the New England Aquarium. New England Aquarium researchers observed a gray whale, a species that has been considered extinct in the Atlantic Ocean for more than two centuries, off the New England coast in an aerial survey. The rare gray whale sighting may be attributed to the species’ adaptation to climate change, scientists said.

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Nitrous Oxide Emissions Increased 40% From 1980 to 2020, Accelerating Climate Change, Study Finds

A new study from a team of international scientists has uncovered that nitrous oxide emissions, one of the most potent greenhouse gases, have risen continuously over a 40-year period.

The report, published in Earth System Science Data, found that nitrous oxide (N2O) emissions increased by 40% from 1980 to 2020, reaching around 3 million metric tons per year. 

According to the report, nitrous oxide emissions had the fastest growth rate in 2020 and 2021 since 1980, when tracking became more reliable. In 2020 alone, nitrous oxide emissions reached around 10 million metric tons, with 8 million metric tons attributed to agriculture, Scripps Institution of Oceanography at the University of California San Diego reported.

The warming effects of one pound of nitrous oxide are about 265 times the warming effects from the same amount of carbon dioxide, the U.S. Environmental Protection Agency reported. While nitrous oxide emissions have been rising, the report noted that the amount of nitrous oxide emissions released from natural sources has been mostly steady, meaning the increase could be heavily attributed to human activities.

Even after 2020, nitrous oxide emissions remain unchecked, with a nearly 25% increase in 2022 compared to pre-industrial levels.

“Nitrous oxide emissions from human activities must decline in order to limit global temperature rise to 2°C as established by the Paris Agreement,” Hanqin Tian, lead author of the report and the Schiller Institute Professor of Global Sustainability at Boston College, said in a press release. “Reducing N2O emissions is the only solution since at this point no technologies exist that can remove N2O from the atmosphere.” 

The report found some progress toward curbing these emissions, although more actions are needed, the authors said. Nitrous oxide emissions in Europe have been declining by 31% since the 1930s. While China has been the No. 1 emitter of nitrous oxides since 2010, according to the report, the country has seen the rate of these emissions slow down since the mid-2010s. Following China and rounding out the top 10 emitters are India, U.S., Brazil, Russia, Pakistan, Australia, Indonesia, Turkey and Canada.

In the U.S., agriculture is a major contributor of nitrous oxides, but emissions from industrial activities have declined. Globally, agriculture contributed to about 74% of all nitrous oxide emissions over the past 10 years, the report found.

“While there have been some successful nitrogen reduction initiatives in different regions, we found an acceleration in the rate of N2O accumulation in the atmosphere in this decade,” said Josep Canadell, executive director at the Global Carbon Project and a research scientist at Australia’s Commonwealth Scientific and Industrial Research Organization. “The growth rates of atmospheric N2O in 2020 and 2021 were higher than any previous observed year and more than 30 percent higher than the average rate of increase in the previous decade.”  

Because nitrous oxide emissions have been reaching record highs in the past few years, the report authors have recommended frequent assessments as well as improvements to agricultural practices, such as limiting the use of nitrogen fertilizers to slow emissions. They also noted that there needs to be better recordings of the sources of these emissions as well as nitrous oxide sinks.

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Only 22 Companies Out of 147 Are on Track to Meet Their Plastic Waste Reduction Targets, Report Finds

In a new report, the nonprofit As You Sow has found that of 147 companies with recyclability targets, only 22 are on track to meet their goals. In total, the report reviewed 225 companies and their progress toward plastic-related goals, with about half of companies receiving an “F” score.

The 2024 Plastic Promises Scorecard has revealed a gap between the plastic waste reduction goals that companies set and the actual actions they are making toward meeting those goals. The report evaluated companies on a total score based on their ambitions and their actions toward goals related to six pillars: recyclability, reduction, recycled content, recovery, reusable and extended producer responsibility. Ambitions counted toward 30% of the total score, while the actual actions companies were taking made up 70% of the final score.

“Plastic Promises Scorecard uses a first-of-its-kind scoring system to evaluate not just what companies say they will do to act on the plastics crisis, but what they have actually accomplished,” Venky Kini, data lead and report partner, said in a press release. “We are pleased to present this tool for companies to evaluate their progress against their peers and identify opportunities for new action and ambition.” 

As Grist reported, even though many companies have goals to reduce their plastics, they are often using more plastic. According to the report, about 100 companies have pledges to use less virgin plastic, but rather than reducing their reliance on plastic, they have plans to swap virgin plastics for recycled plastics.

The findings showed that most of the companies in the report had targets to incorporate recycled content, but the same companies weren’t investing in recycling infrastructure to collect old packaging and recycle it. Only nine of the 225 companies had even set goals to create zero-waste packaging that could be reused or recycled indefinitely, rather than becoming waste.

According to a 2020 report titled Breaking the Plastic Wave, which was cited in the Plastic Promises Scorecard, existing plastic waste reduction pledges by companies and governments are far short of what is needed to prevent plastic pollution from building up in the environment. Breaking the Plastic Wave revealed that if companies and governments met their existing pledges, it would reduce the flow of plastic reaching the oceans by only 7% by 2040. Already, ocean plastic pollution is expected to triple by 2040 without interventions, reaching 29 million metric tons per year.

The latest Plastic Promises Scorecard did show some hope, though. It found that more companies were supportive of producer responsibility legislation, and As You Sow shared in a press release that shareholders for multiple companies, including Hershey and Amazon, were supportive of more sustainable packaging initiatives.

“Companies can use the recommendations and scoring methodology in the Plastic Promises Scorecard to prepare for a future where plastic packaging pollution is no longer an acceptable part of doing business,” said Kelly McBee, lead author of the report and circular economy manager at As You Sow. “This report is designed to be actionable and transparent, giving companies the tools and solutions they need to create a circular economy for plastic.”

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