Carbon Dioxide

The tech giant, which says it has been "carbon neutral" for years, is vowing to go "carbon negative" — by cutting emissions, planting trees and investing in new carbon removal technology.

A United Nations report warns that greenhouse gas emissions from the world's largest economies must drop dramatically in the next decade to avoid the most catastrophic effects of climate change.

The lawsuit comes two days after the Trump administration revoked California's ability to set its own rules for automobiles. The state's top prosecutor blasted the move as "arbitrary and capricious."

In an East Room event that played like a campaign rally, President Trump touted his push for clean air and "crystal clear" water. He made no mention of climate change, a growing concern for voters.

Vice President Mike Pence is scheduled to headline a fundraiser in Columbus on Friday for the oil-and-gas industry.He is scheduled to speak at the annual…

William Happer, a Princeton scientist who is doubtful of the dangers of climate change, appears to be leading a White House challenge to the government's conclusion that global warming is a threat.

A newly released report shows that the United States' CO2 emissions spiked last year. A booming economy and busy transportation sector are to blame.

The EPA says it will keep limits on toxic mercury emissions from coal plants but now deems them not cost-effective. Environmental groups worry the move could hinder future regulations.

The Trump administration wants to reverse a rule that would have required new coal plants to have expensive technology to capture their carbon dioxide emissions.

The fortuitous dip in emissions of the main greenhouse gas, carbon dioxide, during the past three years is over, as economies turn up. The trend in the near future looks grim, say climate scientists.