According to a recent study from the Yale Project on Climate Change, 40 percent of Americans believe there is major scientific disagreement as to whether global warming is real. Yet you would be hard-pressed to find any working climate scientist who didn’t think global warming is happening, and has been for some time. Ideology and corporate interest have skewed public understanding and spread confusion about many of the most important issues of our time. Campaigns to mislead the public and deny well-established scientific knowledge have been effective for over four decades. Changing public perception about the link between smoking and lung cancer, how acid rain & the ozone hole were created and studies on secondhand smoke.