Man-caused Global Warming: The Greatest Scam in World History

Heartland Institute Science Director Jay Lehr was a featured speaker at the pre-election “Freedom Summit” in Chicago put on by local radio station AM 560 The Answer. In a packed room of nearly 200 conservative activists, Lehr explained how the media and “scientific community” collaborate to misinform the public on the shaky hypothesis that human activity – specifically the emission of carbon dioxide – is causing catastrophic climate change.