Anonymous 03/09/2011 at 10:33 am >so this video says that it is not the space problem, 7 billion people is only the size of LA city, but how about water supply? does our earth has enough water for 7+ billion people? Reply ↓
>so this video says that it is not the space problem, 7 billion people is only the size of LA city, but how about water supply? does our earth has enough water for 7+ billion people?