It's a fact that...
Overpopulation is impossible. We die. We reproduce to our needs and environment. As a popluation gain better health and education, in turn this provides work and wealth. Not only does this consume time and effort but it negates the 'need' to have children. The average family now has 2.2 children which is barely enough to keep the population stable as, again I reiterate, we, as a species, die. If we somehow live for eternity then I would say there would be a problem. But we don't so there isn't.
Those who say "Yes" to this answer are highly uneducated. This worries me and should worry you, too.