Umair Irfan

A major heat wave is affecting most of the United States. Its biggest risks may come at night.

Here’s how much the winters and summers in the city closest to you may change in about 30 years.

We can anticipate where storms will go, but their rain and wind are far more difficult to predict.

Uranium enrichment is a critical step in making nuclear energy and nuclear weapons.

Adding 2.2 billion acres of tree cover would capture two-thirds of man-made carbon emissions, a new study found.

The walkout meant Democrats didn’t have the quorum they needed to conduct business.

All-time temperature records have been broken in the heat wave sweeping the continent.

Climate is one of the most important issues for Democratic primary voters. It deserves its own event.