Mitigation

Earth Day, first marked in the United States in 1970, has grown into a worldwide commemoration in its 50th year. Download our Earth Day poster.

Los Angeles and other U.S. cities are covering their asphalt roads with a coating that prevents the blacktop from absorbing and radiating the sun's heat.

A year has passed since nearly 200 countries came together to adopt the historic Paris agreement on climate. Check out what has happened since then.

Over 300 U.S. businesses, many from the Fortune 500, signed a statement renewing private-sector support for the Paris agreement on climate change.

"What we do right now, today, matters," Kerry told delegates at a climate change summit developing rules to implement the Paris climate agreement.

Scientists are trying to learn more about Azolla, a plant that might help reduce man-made climate change — but there are some challenges.

After more than 190 countries signed the Paris agreement, it moved toward going into force in only months. What's next for the landmark climate accord?

If the airline industry were a country, it would be the world's seventh-largest carbon polluter. New rules set limits on increases in aircraft emissions.

The Paris climate agreement will enter into force November 4, after the EU ratified the accord to bring it past a key threshold.