The Trump administration is dismantling a $368 million deep-ocean observation system that monitors marine ecosystems and the effects of climate change.

The Trump administration is dismantling a $368 million deep-ocean observation system that monitors marine ecosystems and the effects of climate change.

© National Science Foundation Ocean Observatories Initiative

A PAC representing wind and solar energy interests spent $1.1 million to boost the Republican primary opponent of Chip Roy, an opponent of renewables. Now they are trying to save a Republican ally in Iowa.

A PAC representing wind and solar energy interests spent $1.1 million to boost the Republican primary opponent of Chip Roy, an opponent of renewables. Now they are trying to save a Republican ally in Iowa.

© Michael A. McCoy for The New York Times

The rules were established by the Biden administration after research linked the compounds to a range of serious health problems.

© Haiyun Jiang/The New York Times

The administration is delaying a phaseout of hydrofluorocarbons, potent planet-warming chemicals used in air-conditioning and refrigeration.

© Gene J. Puskar/Associated Press