David Gelles

David Keith, lead at the University of Chicago’s Climate Systems Engineering Initiative, June 24, in Chicago. (Mustafa Hussain/The New York Times)

David Keith suggests releasing sulfur dioxide into the atmosphere to lower global temperatures, igniting both interest and concern over the potential risks and benefits of geoengineering.

Critics say even researching the idea is dangerous.

CHICAGO — David Keith was a graduate student in 1991 when a volcano erupted in the Philippines, sending a cloud of ash toward the edge of space. Seventeen million tons of sulfur dioxide released from Mount Pinatubo spread across the stratosphere, reflecting some of the sun’s energy away from Earth. The result was a drop in average temperatures in the Northern Hemisphere by roughly one degree Fahrenheit in the year that followed. Today, Keith cites that event as validation of an idea that has bec

This might be a cliche, but dismissals are like breakups: hard to pull off correctly; stressful; and rarely mutual . In this blog post, I want to focus on the last point. While dismissals are virtually never mutual, there are circumstances where both the employer and the employee mutually part ways amicably. That's right, in these cases you can be friends with your ex. How is such a thing achieved? Enter the exit package.

The lawsuit, seeking ‘multiple billions of dollars,’ opens a new front in the legal battles with oil and gas companies over climate and environmental issues.

A pair of restless entrepreneurs are releasing pollutants in the sky to try to cool the planet.

The Times hosted leaders and policymakers to talk about growing threats of climate change, and spoke with the C.E.O. of Occidental Petroleum.

Big tech companies say A.I. can help solve climate change, even as it’s driving up their emissions and raising doubts about their climate goals.

The former president says he wants “clean air and clean water,” but he has rolled back environmental rules and dismissed the scientific consensus on climate change.