Global warming has really taken off since the 1970s. The warming in the past several decades has been more than it was the whole previous record, which is about 100 years before that.

The emissions that caused this past episode of global warming probably lasted 10,000 years. By burning fossil fuels, we are likely to emit the same amount over the next three centuries.

This winter makes global warming seem more real.

The ocean is like this black box. We just don't know what's going on out there. Is it global warming? Is it pollution? Predators?

These studies each quantify, in a variety of ways, the risks we are already dealing with in the global warming that is clearly well under way.

We're not convinced that global warming is playing an important role yet, or if at all, in this era of increased activity.