To anyone living in the West, the best thing to do for the environment is to NOT generate another human that produces 50 times the CO2 than every other human in second and third world countries.

You fail to articulate as to why having kids would be beneficial for the environment. Sorry but you sound like a bitter parent envious of other people's time and freedom, you know, misery loves company. Are you also worried about the disappearance of the white race and the replacement by immigrants?

Having a kid or not isn't selfless or selfish, is simply not anyone's business except for the two involved.