New York lawmakers approved one of the most aggressive climate policies in the world early Thursday, requiring net zero emissions for all sectors of the state's economy by mid-century.

The Climate Leadership and Communities Protection Act requires New York to get all of its electricity from carbon-free energy sources by 2040 and then reach net zero emissions by 2050.

United States spy satellites that secretly kept watch over the Himalayas during the Cold War are helping researchers piece together the most detailed view yet of the region's accelerating ice loss.

The U.S. military used a telescopic camera system to take thousands of photographs worldwide as part of its surveillance of the Soviet Union, China and other countries, dating as far back as the 1970s.

This story was updated with Wednesday's vote in the U.S. House of Representatives.

Democrats mounted a challenge in the U.S. House of Representatives on Wednesday against what they call a raid by the natural gas and plastics industries on a pot of federal money created to help finance innovations that reduce greenhouse gas emissions.

The Trump administration on Wednesday executed its long-anticipated retreat from the Obama administration's signature plan to tackle climate change by cutting emissions from coal-fired power plants.

Its replacement rule is so narrowly written that it allows only a few modest measures to cut carbon dioxide emissions. The Trump administration conceded it would accomplish less than the rule it threw out and would be only a tiny fraction cleaner than leaving one of the main sources of greenhouse gases completely unregulated.