Video of Heartland Institute Science Director Jay Lehr at the AM 560 Freedom Summit in suburban Chicago on October 29, 2016. Lehr’s thesis: There is not now, nor has there ever been, any scientific evidence proving mankind has affected the climate on a global scale. Our media and “scientific community” tell us otherwise. But here’s the truth: The hypothesis of man-caused global warming is based almost entirely on computer modeling that are, quite simply, a bad scientific joke. However, that has not stopped politicians from pouring hundreds of millions in taxpayer-funded grants to unethical scientists to keep the scam going. The result is continued impoverishment of the poor, a declining standard of living for the middle class, and greater empowerment of the ruling class.