Climate change is controlled primarily by cyclical eccentricities inEarth's rotation and orbit, as well as variations in the sun's energy output.
"Greenhouse gases" in Earth's atmosphere also influence Earth's temperature, but in a much smaller way. Human additions to total greenhouse gases play a still smaller role, contributing about 0.2% - 0.3% (no one DENIES this) to Earth's greenhouse effect.
For a hilarious list of all the things attributed to global warming, visit http://www.numberwatch.co.uk/warmlist.htm.