In The Curve: Monitoring Rising Carbon Emissions

  • Published: Feb 28th, 2011

How we know carbon dioxide in the atmosphere is increasing — and it's our bad.

The Age of Man: A New Geologic Epoch

The Age of Man: A New Geologic Epoch

  • Published: Feb 22nd, 2011

Recent human activity is having such a significant environmental impact on the planet that we may be entering a new geologic epoch, known as the Anthropocene.

Permafrost Timebomb

  • Published: Feb 18th, 2011

As the Arctic melts, the ground may release half again as much carbon dioxide as humans have created through fossil-fuel burning in the past few hundred years.

20 Big U.S. Cities that Should Worry About Sea Level Rise

20 Big U.S. Cities that Should Worry About Sea Level Rise

  • Published: Feb 9th, 2011

A new study highlights 180 regions in the U.S. where sea level rise is likely to have a major impact. Here are photos of the 20 cities with populations over 300,000 which are likely to be affected.

Renewable Cost Parity: Is Wind Competitive With Gas?

  • Published: Feb 8th, 2011

The American Wind Energy Association claims wind power is largely cost competitive with natural gas. But what does "competitive" really mean?

The Year the Arctic Shifted South

  • Published: Feb 7th, 2011

This winter has featured unusually cold and snowy conditions in the Lower-48 states, with much milder than average conditions in the Arctic.

Arctic Ice Melt Adding More Heat to the Atmosphere Than Previously Thought

  • Published: Jan 20th, 2011

A new study says that melting snow and ice cover in the Northern Hemisphere is causing more warming than computer models predicted.

How Will We Know if 2010 Was the Warmest Year on Record?

  • Published: Dec 21st, 2010

Researchers using different techniques have arrived at a similar conclusion: 2010 was a remarkably warm year. But did it set a new record?