The EPA has revised proposed regulations for greenhouse gas emissions from new power plants. UCLA environmental law professor Ann Carlson tells host Steve Curwood that coal plant developers may find it tough to meet the new standard, and novel approaches will be needed to successfully regulate existing coal power stations.

A landmark report from the UN’s Intergovernmental Panel on Climate Change (IPCC) says scientists are 95% certain that humans are responsible for global warming. Harvard scientist James J. McCarthy tells host Steve Curwood that arctic ice continues to melt and sea levels are rising faster than earlier predictions, as almost all of the planetary warming is being absorbed by the oceans.

The National Geographic Society’s magazine is celebrating its 125th anniversary with a special edition featuring some of its most iconic photographs. Sarah Leen, the magazine's director of photography, talks with host Steve Curwood about the magazine’s history and some of its most compelling images.

Researchers have discovered a natural hydrocarbon in the roots of a grass that could reduce greenhouse gas emissions in agriculture. Andrew Keys reports in this week’s Note on Emerging Science.

In a 2009 incident that came to be known as 'climategate', several climate scientists had their e-mails hacked and quoted out of context in an bid to discredit the researchers and their work. Host Steve Curwood talks with Penn State meteorologist scientist Michael Mann, who was a target of the attacks and has now written a book about the experience.

Writer Rod Clark revisits an old limestone quarry full of memories near the village where he grew up, and finds the towering cliffs and hidden caves still a magnet for children today.

The US southwest is typically a dry and dusty desert, yet in summer torrential rains can spawn the sudden appearance of noisy amphibians. Sarah Bromer reports from Tucson.