Copenhagen and Climate Change

The people of the world continue to grapple with the question of how best to combat climate change

What Is the Right Number to Combat Climate Change?

Is there a safe level of carbon dioxide in the atmosphere to prevent "dangerous anthropogenic interference" in the climate?


How Can Humanity Avoid or Reverse the Dangers Posed by a Warming Climate?

With greenhouse gas emissions continuing to rise, strong efforts will be required to reverse global warming


What Explains Past Climate Change?

Was the climate really hotter during medieval times? David Biello reports


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