Not long ago, Rep. Thomas Massey set a clever trap for John Kerry when he got him to admit that CO2 levels prior to humans walking the earth, “800,000 years ago,” were several times higher than they are today and “geological events caused that to happen,” not humans. Kerry, with his liberal arts degree in Political Science, not a real science degree, talked about the scientific consensus of anthropogenic (man-made) global warming caused by CO2, the gas of plant life.