The Science

In the mid-90s, NASA climatologist Jim Hansen offered up a $100 bet to a roomful of hundreds of climatologists, that one of the next three years would be the hottest ever recorded. Hansen got only three takers. They lost—the very next year. Scientists like Jim Hansen can safely make these kinds of seemingly audacious predictions of record rising temperatures because they know that the basic science of global warming is well understood and even, within range, predictable. Check out the facts....

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