
The Fifth National Climate Assessment was released today. The message: change is here, but immediate action can avert the worst impacts.

For environmental policy to be effective, it must encourage the transition already underway in many private businesses, focusing on continuous improvement rather than the achievement of symbolic goals, with a broader scope than climate change alone.

A new cataloging system will help better preserve, track and share thousands of tree ring samples from around the globe.

The authors of a new book discuss how urban areas can take climate action without running afoul of state and federal laws.

Drilling into sub-ice deposits left behind during times when the Earth was warmer than today should provide insights into how a massive ice sheet will react to human-induced climate change.

In the Climate LIVE video series, experts from across the Columbia Climate School discuss topics in climate and sustainability for grade school and university students, educators, parents and the public.

The future of America’s water supply is an open question. The need for an adequate water supply is not open to question.

Two sustainable-development students reflect on career-defining internships.

James Hansen warned the world in the 1980s that global warming was coming. Now, he is warning that it is barreling down even faster than expected.