Man-made global warming is saving the Earth from “another ice age,” White House Science Advisor Eric Holdren says in a new video promoting man-made global warming theory: “We know beyond any reasonable doubt that humans are the main cause of the warming of the earth’s climate that has been measured over the past few decades. The warming is unequivocal. “While the climate of the earth has changed over the millennia as a result of natural factors – principally changes in the tilt and orientation of the earth’s axis and rotation, and in the shape of its orbit around the sun...