That's what a lot of people seem to be doing. The rate of growth for the global population has been falling since the late 60s and is expected to hit 0 in another 40 years. The bad news is it'll still grow another 40% before we get there. Japan's population has been declining for about a decade and China is expect to see their population peak in about 5 years. Without immigration, the US would see it's peak population by the end of the decade as well.Bottom line is anyone on either side wanting to lessen the environmental impact on Earth the best thing is not to have children!
People are what's causing problems...right?