Human caused co2 emissions is 0.2% of the global natural co2 emissions (from the sea, decaying vegetation etc). Co2 makes up 4% of greenhouse gasses.
Do the math
please watch Cosmos Sunday night for a full and clear explanation
and don't listen to Deniers they are influenced by lobbyists for Big Oil
0.00000023% +/- 0.00000001%
we influence it
The is mains to influence for the human on global warming:
*Burning fossil fuels
*Cutting the forests.
Human-caused global warming and a climate that's highly sensitive to an increased greenhouse effect.
We write the rule books that's how we influence it.
http://www.eea.europa.eu/themes/climate/...