Gore agrees that the planet's temperature has indeed experienced up-and-down cycles, but he says the current up cycle is too extreme. "It's way off the charts compared to what those natural fluctuations are," he says.
No place is immune to global warming, Gore says. "Of the thousand largest glaciers on every continent, 997 of them are receding," he says. "And it's not seasonal."
"Scientists say if we let it get that high on the warm side, it would be an utter catastrophe, and it would be unethical and immoral where our children are concerned."