Overpopulation is total bullshit. Humans spend too much money on pointless things like wars. I read somewhere that the world spent way more then 100 trillion dollars in one year just for war. Maybe if we used that money for science we could start building cities underwater or later in air. Everything is possible. The Earth has enough place. We could have environment-friendly technology everywhere and live with the nature as one. Give and take the same amount. Overpopulation is a myth. And even if we reached the point where there would be too many people for earth to sustain by then we could be living on the fucking Jupiter. Open your minds people. For fuck sake.