After more than half a century of Earth Days, one planetary challenge—climate change—threatens our planet more than ever.
In 1970, the year Sen. Gaylord Nelson, D-Wisc., organized the first Earth Day events, the annual average concentration of carbon dioxide in the atmosphere was 326 parts per million. In 2025, it was 31% higher, at 427 parts per million.
Using 2 decades of satellite data, researchers learned that wildfires in North America don’t follow the same script: In western Canada, snow reflectivity drives a cooling effect, whereas in Alaska, permafrost burning leads to net warming.
A new calculation includes ocean ecosystems when assessing the monetary impact of climate change.
The change was caused by thirsty vegetation taking up less carbon than normal, not by the year’s extended fire season, new research shows.
That’s much faster than what most scientists thought.
Tomorrow, the EPA will revoke the 2009 Endangerment Finding, finalizing a July proposal to do so, Press Secretary Karoline Leavitt said in a 10 February announcement.
Trump’s first year in office has reversed many climate policy decisions and aggressively advanced fossil fuel interests.
In an executive order issued on 7 January, the White House ordered the country’s withdrawal from 66 international agreements determined to be “contrary to the interests of the United States,” including two global efforts to combat climate change: the United Nations Framework Convention on Climate Change (UNFCCC) and the Intergovernmental Panel on Climate Change (IPCC).
At the White House today, President Donald Trump announced his administration would “reset” vehicle fuel economy standards. Trump said the administration plans to revoke tightened standards, also known as Corporate Average Fuel Economy (CAFE) standards, set by President Joe Biden in 2024.
Quantitative data at real-world scales are needed to assess the effects of cover cropping and other practices on soil carbon storage. Large-scale medical studies provide a proven methodology.
