You are actually incorrect. This planet can certainly sustain more humans. People focus so much on saying how overpopulation is a serious problem (and I completely agree on that, this world would be a much safer and better place with half of the population it has now and with this modern way of living, consumerism it certainly is the biggest issue) but a lot of people fail to see that there is a way to support this number of people by feeding them sustainable diets. It takes an obscene amount of water and food (corn, rice, soy...) to make 1lb of meat but if you actually use that amount of energy on focusing on feeding the starving people around the globe we wouldn't be having this problem and a lot of people would be healthier and less overweight the other very important thing to be mentioned is that we would save 130million acres of forest and about 137 plant and animal species. . The most important thing, we would reduce the pollution and probably save ourselves from ourselves.