Global Warming believers, do you guys think that there is a thing called 'human overpopulation' ?

And, if so, do you think maybe that might play a part in global warming ? And if so, why do I rarely if ever hear 'over population' mentioned when people warn us about GW ? I would think that Democrats would want us to stop making babies, I mean, uming population growth is an important factor in reducing green house ges.