Extending these to more difficult lines of inquiry, it's clear that changes in earth's atmosphere are causing global temperatures to rise, for the Arctic ice cap to melt, for glaciers around the world to disappear, and for the incidence of hurricanes and droughts to increase. These are facts, and nearly all scientists today agree that the inference from these facts is that Global Warming is a fact. It is the truth, even if it's extremely inconvenient.

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