Global warming made heat records more likely for about 80 percent of an observed area of the globe.
A new study shows air pollution from Canada's oil sands could be 4 times higher than previously reported.
As rich countries have foundered, India and China have emerged as global leaders in tackling warming.
The world's marquee carbon dioxide observatory just recorded a major climate milestone.
Removing carbon dioxide from the air may be the most effective way to meet the globe's ambitious climate goals.
Climate change has the planet on a hot streak it's unlikely to break anytime soon.
The amount of carbon dioxide in the atmosphere has a strong correlation with rising temperatures.
Since the first Earth Day in 1970, the average annual temperature in every state has climbed.
March was the second hottest March on record, according to NASA, behind only 2016, a mark of rising global warming.
Heat waves have set in early in northern India. They are expected to become more common with warming.
Major oil companies, feeling pressure from low oil prices and global climate policy, are fleeing Canada's oil sands.
The average date of the last spring freeze is shifting earlier in the year, extending the pollen and growing season.
March saw record low Arctic sea ice, marking the sixth month in a row of record or near-record lows.
U.S. energy-related carbon pollution fell in 2016, part of a decade-long trend as utilities use less coal.
Climate change has fueled bleaching at the Great Barrier Reef for an unprecedented two years in a row.
Coal use in the U.S. fell 9 percent in 2016, even as the Trump administration seeks a coal industry revival.
Dozens of GOP-sponsored bills have been introduced in Congress that seek to hamstring federal climate action.
The world is on track to reach an ominous carbon dioxide milestone by mid-century.
California finally has a healthy mountain snowpack, but as temperatures continue to rise, that could change in the future.
More water is flowing this year in California from frequent storms and melting snowpack.