In an early analysis, the drug maker zeroed in on a promising dosing plan for its vaccine.

General Motors said it would no longer back President Trump’s effort to strip California of the power to set fuel economy standards.

President-elect Joseph R. Biden Jr’s aggressive approach to climate change includes undoing years of President Trump’s regulatory rollbacks at agencies like the E.P.A

The president-elect is making the climate a top priority.

President-elect Biden can restore many of the 100-plus environmental regulations that President Trump rolled back, but much of the damage to the climate cannot be reversed.

The administration is imposing new limits on the National Oceanic and Atmospheric Administration that would undercut action against global warming.

The announcement, coming weeks after a similar pledge by China, will require a major overhaul of the infrastructure in Japan, which remains heavily dependent on fossil fuels.

The most widespread drought in the continental United States since 2013 covers more than 45 percent of the Lower 48 states, federal scientists said.

Researchers in Australia blamed climate change for the loss, which they said could diminish critical habitats for fish and other marine life.

This year, roughly a quarter of the vast Pantanal wetland in Brazil, one of the most biodiverse places on Earth, has burned in wildfires worsened by climate change. What happens to a rich and unique biome when so much is destroyed?