Mountain regions around the world are heating up faster than the lands below them, triggering dramatic shifts in snow, rain, and water supply that could affect over a billion people. A major global ...

All nations of the world had homework this year: submit new-and-improved plans to fight climate change. But the plans they handed in “have barely moved the needle” on reducing Earth’s future warming, ...

The idea began in California’s Sierra Nevada, a towering spine of rock and ice where rising temperatures and the decline of snowpack are transforming ecosystems, sometimes with catastrophic ...

Tipping points are thresholds within key Earth systems beyond which lasting changes to the environment occur. Breaching a tipping point kicks off a feedback loop that sends systems into a different ...

This year’s Conference of the Parties, the annual United Nations meeting meant to avert catastrophic climate change, was subject to a ham-fisted metaphor. On Thursday, the Brazilian venue hosting the ...

Mass coral bleaching occurs when unusually warm ocean temperatures disrupt the partnership between corals and the microscopic algae that supply most of their energy, leaving corals weakened and often ...

WASHINGTON — Earth's average temperature last year hovered among one of the three hottest on record, while the past three years indicate that warming could be speeding up, international climate ...