Yet the collective effect of the world's termite population produces about 10X the CO2 that all of mankind does. The human race is but a single grain of sand on a mile long beach. We aren't significant at all on a planetary scale.

November 5, 1982 issue of SCIENCE magazine:

The worlds total of termites emits 10 times the CO2 than does the entire population of humans, all their factories and all their vehicles combined. Makeup of CO2 in the atmosphere: .04%. The atmosphere contains 720 billion tons of CO2 and humans contribute only 6 GT. Man's contribution is .83% of .04% of the atmosphere. Manmade CO2 is not a significant greenhouse gas at those numbers. Water vapor accounts for up to 95% of all solar radiation attenuation.