The most comprehensive assessment yet of a powerful greenhouse gas shows which countries are driving the increase, and which ones are successfully cutting emissions.

A weather station in the Shetland Islands has one of the world’s best-preserved long records of atmospheric electricity.

A weather station in the Shetland Islands has one of the world’s best-preserved long records of atmospheric electricity.

A weather station in the Shetland Islands has one of the world’s best-preserved long records of atmospheric electricity.

A powerful storm system produced dozens of destructive tornadoes over three days that tore apart homes in Oklahoma, Nebraska and Iowa. A meteorologist explains the conditions that fueled them.

There are an infinite number of paths an ice crystal can take before you touch it.

We know particles from spacecrafts are in the stratosphere. But what this means for the ozone layer or the climate is still unknown.

A surprising number of new consumer tech products promise to improve air quality.

An atmospheric scientist explains how El Niño works, this year’s oddities and why this phenomenon doesn’t last long.

There’s a rule of thumb that rainfall intensity increases by about 7% per degree Celsius as temperatures rise. But the increase is much higher in the mountains, scientists found.