Global Warming

Carbon dioxide in Earth's atmosphere just reached a major milestone

7 reasons why Arctic sea ice matters

Extinct smallpox virus could be resurrected by global warming

Melting ice could expose Cold War toxic waste

Are wildfires getting worse?

Sweltering 2016 is a warning from the future

What are megaslumps, and how do they threaten our planet?

As U.N. makes history on Earth Day, Leonardo DiCaprio reminds us not to rest on laurels

Congo's rain forests under logging threat

Could cleaner air be worsening global warming?

Droughts could kill many of the world's trees

Rising sea levels will slow down Earth's rotation