Extreme dry and humid heat events show distinct seasonality often not aligned with meteorological summer, even in the tropics Extreme heat seasons have expanded since the 1980s over about half of...

Improving water quality has more swimmers looking to take the plunge.

YouTube video by Omelas Podcast

Researchers at Columbia’s Lamont-Doherty Earth Observatory measured the air in and around New York City apartment buildings. What they found surprised them.

Letter: A financial model that could cut the cost of installing solar panels for many homeowners is welcomed by Alexis Abramson

Climate change is to blame, say government officials.

Global cooperation revealed a landslide, not a glacial collapse, likely initiated the cascade of events

Scientists have found that people are being exposed to more toxins than previously known.

Extreme weather — plus the Knicks parade — brought a jump in postponements.

The powerful earthquake that hit Colombia on Monday slammed the country because of its location near the "Ring of Fire" area. Eric Beaucé, a research scientist at Columbia Climate School, has more.