This likely means the end of the $8 billion pipeline, a years-long project that would have carried oil sands crude from Alberta, Canada, to the American Gulf Coast.
President Biden's wave of executive actions includes an order to reexamine one controversial, but widely used, pesticide called chlorpyrifos. The Trump administration kept it on the market.
President Biden has set his sights on more than 100 Trump administration environmental rollbacks as well as plans to rejoin the international climate accord.
Some Massachusetts voters hope that the Biden administration will do better on protecting the environment and managing the pandemic. But some say they fear President Biden may be too moderate.
Trump called climate change a hoax. Biden calls it an existential threat. Washington Post journalist Juliet Eilperin talks about how Biden might reverse some of his predecessor's policies.
As climate impacts worsen, some people are moving to other parts of the country that they hope won't suffer as much. Town planners in New Hampshire are already preparing for a possible influx.
Pipeliners Local 798, which represents thousands of workers on projects across the country, has a history of racism and faces new allegations it discriminated against Black members.
Journalist Beth Gardiner and activist Yvette Arellano explain the long-term health effects of air pollution. Yvette lives in a Houston neighborhood near the largest petrochemical complex in the U.S.