In the summer of 2013, two Alexander Archipelago wolves (Canis lupus ligoni), a subspecies of gray wolf, swam across a narrow channel to reach Pleasant Island, Alaska, a 19-square-mile rock jutting out of the stormy Gulf of Alaska. Wolves hadn’t previously lived on Pleasant Island, and they quickly ran roughshod over the island’s deer population. Within a few years, the wolves blossomed to a family of 13, and the deer, in turn, were entirely wiped out.

This year will conclude as the second hottest on record, surpassed only by 2024. It continues a recent trend of exceptional, unexplained warming. The last three years have been, by a wide margin, the hottest ever recorded.

The Arctic endured a year of record heat and shrunken sea ice as the world’s northern latitudes continue a rapid shift to becoming rainier and less ice-bound due to the climate crisis, scientists have reported.

This year has seen U.S. clean tech companies abandon dozens of manufacturing projects as the Trump administration slashed U.S. support for renewable energy.

Britain recorded 1,622 hours of sunshine through the middle of December, putting it well ahead of its previous yearly record of 1,587 hours, set in 2003, according to the Met Office. 

Tehran has for several weeks been one of the most polluted cities in the world, according to air quality monitors. The pollution has forced schools and offices to close, and it had dire consequences for human health. In recent weeks, more than 350 deaths have been linked to pollution. Emergency services have received thousands of calls connected to poor air quality, straining response services. Across the country, hospitals have reported a rising number of patients with lung and heart issues.

Iran is looking to relocate the nation’s capital because of severe water shortages that make Tehran unsustainable. Experts say the crisis was caused by years of ill-conceived dam projects and overpumping that destroyed a centuries-old system for tapping underground reserves. 

Warming is fueling ever larger wildfires in the U.S. West, which are becoming a major source of pollution. A new study finds that warming is to blame for nearly half of particulate pollution and two-thirds of emissions unleashed by western wildfires.

Brown bears living near villages in central Italy have evolved to be less aggressive, according to a new study, the latest to show how humans are shaping the evolution of wildlife.

Historically, more industry meant more burning of fossil fuels. But renewable energy has made it possible to generate more wealth without producing more emissions. In the decade since the Paris Agreement, a growing number of countries have “decoupled” growth from emissions, according to a new analysis from the Energy & Climate Intelligence Unit, a think tank based in London.

A rash of data centers planned for western Pennsylvania has residents and environmentalists on edge. The sprawling complexes will be powered by plants that burn fracked natural gas, whose production has caused air and water pollution in the region and has known health risks.

With hundreds of satellites launched each year and tens of thousands more planned, scientists are increasingly concerned about an emerging problem: emissions from the fuels burned in launches and from...

Researchers are finding a disturbing uptick in the trade of African hornbills and their body parts in West African voodoo markets and globally on the internet. Conservationists want international prot...