Human activity affects global surface temperatures by changing Earth’s radiative balance—the “give and take” between what comes in during the day a...

Global warming, the phenomenon of increasing average air temperatures near Earth’s surface over the past one to two centuries, happens mostly in th...

Continued global warming is expected to impact everything from energy use to water availability to crop productivity throughout the world. Poor cou...

Polar bears live in the Arctic, where they use the region’s ice floes as they hunt seals and other marine mammals. Temperature increases related to...