Last year was the hottest year on record, the top 10 hottest years were all in the past decade and planet-heating carbon dioxide in the atmosphere is at its highest levels in the last 800,000 years, a report Wednesday said

Experts say coal may be "cleaner than ever," but it's still not "clean" energy.

Shorter winters and unpredictable weather are changing how automakers test new vehicles.

You might be wishing for warmer temperatures, but when spring comes early, it's also a signal that human-amplified climate change is affecting the season.

Unprecedented heat led to an unexpected level of sea level rise in 2024, according to a new NASA analysis.

Staffers have been told they are prohibited from communicating with grantee partners they are supposed to monitor, according to multiple sources inside the agency. ABC News’ MaryAlice Parks reports.

The head of the Environmental Protection Agency has announced a series of actions to roll back landmark environmental regulations, including rules on pollution from coal-fired power plants, climate change and electric vehicles

Climate change could threaten the future use of satellites and significantly reduce the number of spacecraft that can safety orbit Earth, according to new research.

The Supreme Court has rejected a lawsuit from Republican attorneys general in 19 states aimed at blocking climate change suits against the oil and gas industry from Democratic-led states

Butterfly populations have dropped by 22% in the United States, according to a new study published Thursday in the journal Science.

Experts say sightings have been steadily falling in the last 20 years, sparking fears that one-quarter of all butterflies have been wiped out.

A new study finds the number of butterflies has dropped 22% since 2000, a new study finds

Climate change could continue to complicate iconic dogsledding races around the country as rising global temperatures make snowpack in cold regions less reliable.

The United States has withdrawn from a climate agreement where rich nations have pledged billions of dollars to help a small group of developing countries switch from coal to green energy sources

Longer periods of extreme heat has been found to accelerate biological age in older adults by up to two years, according to new research.

ABC News chief meteorologist Ginger Zee examines claims made in Al Gore’s documentary, “An Inconvenient Truth,” almost 20 years after its release.

The Earth is seeing longer, hotter summers and shorter, milder winters due to climate change, experts say.

ABC News chief meteorologist Ginger Zee breaks down the impact of private jets on the environment, and possible solutions to this problem.

The average surface air temperature was 55.81 degrees Fahrenheit That's 1.42 degrees Fahrenheit above the 1991-2020 average for the month.

A coastal community in Southern California is shifting downslope toward the Pacific Ocean at a rapid rate, according to NASA.

Web managers were told to identify, archive or unpublish materials mentioning climate change by "no later than close of business this Friday," according to internal emails obtained by ABC News.

The U.S. Department of Agriculture has directed officials to remove content related to climate change from its public websites, according to emails obtained by ABC News.

Last year, 2024, was the warmest year on record for the planet, easily breaking the previous record set just a year earlier.

Scientists have quantified how much climate change has driven the population decline of polar bears living in Canada's Hudson Bay.

The clock is set to 89 seconds to "midnight" as scientists and security experts say humanity is close to facing a global catastrophe with no advancement on nuclear risks and climate change.

The impact of human-amplified climate change on popular winter sports.

ABC News chief meteorologist Ginger Zee looks at how a decades long international effort to heal the ozone layer could be applied elsewhere.

Gina McCarthy, former White House climate adviser under the Biden administration, talks about the president’s plans to tackle energy and climate issues.

ABC News chief meteorologist Ginger Zee explains the science that determines how much climate change factors into natural disasters.

On his first day in office, President Donald Trump is expected to turn away from former President Joe Biden's environmental policies with a suite of new priorities.

Big tech faces a "very different world" under Trump, one expert said.

Epic events like the Southern California wildfires do not have a singular cause.

Climate change has likely contributed to the unprecedented wildfires that are raging through Southern California, research shows.

The fires blazing in Los Angeles County mark the latest unprecedented natural disaster. Experts say officials everywhere should prepare for future climate disasters.

In 2024, the level of greenhouse gases in the atmosphere reached the highest annual levels ever recorded on the planet, according to the Copernicus Climate Change Service.

California has been given the green light by the U.S. Environmental Protection Agency (EPA) to ban the sale of new gas-powered cars and light trucks by 2035.

The sun may be the key to all life on Earth, but it is not the reason global temperatures have been rapidly rising in the last century and a half.

The carbon footprint from the travel industry is growing at rates never seen before, according to new research.

ABC News chief meteorologist Ginger Zee explains why the sun isn’t to blame for what could be the warmest year recorded on Earth.

Global warming is impacting the Florida scrub-jay, a one-of-a-kind bird species, in a way that is surprising to ornithologists.

Global warming in impacting a one-of-a-kind bird species in Florida in a way that is surprising ornithologists, a study found.

The power of the ocean could soon be used to power homes in the U.S. as scientists prepare to test an untapped form of renewable energy.

Jonathan McNamara, the communications director of the American Red Cross discusses "Giving Tuesday," a movement to celebrate generosity and donations during the holiday season.

Texas has the potential to become a major producer of green hydrogen due to its existing energy infrastructure, according to a new study.

Salt water from the ocean is starting to creep into the Delaware River Basin due to intensifying drought and sea level rise, according to officials.

Climate and weather are two terms that go hand in hand but often get conflated.

Climate and weather are two terms that go hand in hand but often get conflated. ABC News chief meteorologist Ginger Zee breaks it down.

Thanksgiving may be the holiday best known for indulging, but there are ways to enjoy your favorite meal of the year while keeping the environment in mind, experts say.

The new deal, known as “climate cash,” calls for wealthy countries to contribute $300 billion annually to help developing nations deal with the effects of climate change.

A look at the numbers behind the United Nations’ annual Climate Change Conference, known as COP29, and what nations, rich and poor, must accomplish to keep global temperatures from rising.