Brad Plumer

Deforestation in the Brazilian Amazon has dropped 70 percent since 2005.

So far, the turmoil has only affected a fairly small slice of Iraq’s oil infrastructure — though there’s still the potential for things to get worse.

Ever wonder what America’s energy infrastructure looks like? All those power plants and coal mines and oil wells and transmission lines?

A new study finds that loss of milkweed plants in the US is the main reason for the monarchs’ decline.

A revealing interview with The New York Times.

Yes, we’ve reached the point where we can’t avoid significant temperature increases. But it can always get worse.

The key is that there’s not one policy here — every state will have a different target.