This video clip from the film “Global Warming or Global Governance” shows that a major premise of the film “An Inconvenient Truth” is that Carbon Dioxide is the major greenhouse gas that drives the temperature of the Earth.  In fact a high correlation does exist between CO2 levels and temperature, however examinations of ice core data proves that temperature levels have driven the levels of CO2, not the other way around.  Historically CO2 levels have lagged temperature increases by as much as 800 years.