This issue divides climate academics more than almost any other.

The number of satellites is exploding, and we still don’t have a fully safe way to dispose of them.

Trump has long been a climate-sceptic. But he’s close to tech figures who like big technological solutions to global problems.

On top of rising greenhouse gas emissions, aerosol pollution which would normally cool Earth has fallen.

New research illustrates why popping bubbles fire some contaminants into the air, while allowing others to sink harmlessly.

Thanks to humans, the concentration of planet-warming carbon dioxide in the atmosphere is now 50% higher than before the industrial era. These gases are raising Earth’s temperature.

Thanks to humans, the atmosphere has 50% more planet-warming carbon dioxide today than it did before the industrial era. Those gases will continue raising Earth’s temperature for years.

Solid aerosols from the Arctic "didn't look like anything we had ever seen in the literature, in the Arctic, or anywhere else in the world."

The CDC’s updated mask guidelines say that cloth masks offer the least protection from COVID-19. Differences in the materials masks are made from and the ways they fit are the reason.