As a general rule they won't talk about overpopulation being a problem because they know that the population will likely peak within their children's lifetimes.
They do talk about whether the earth can sustain that population as a reason not to have children. They are correct to. Their children might be the generation who have to explain to their children what fish tasted like.
They do talk about whether the earth can sustain that population as a reason not to have children. They are correct to. Their children might be the generation who have to explain to their children what fish tasted like.