The world produces more than enough food to feed everyone, but people are still starving. 80% of America's corn goes to feeding livestock and ethanol. (don't get me wrong I'm glad we have an alternative to fossil fuels). Food is wasted in restaurants, and people in 3rd world countries struggle to grow crops in their environments where it's not used to growing. Rain-forest is surprisingly awful for agriculture. And also population growth is slowing because more people are choosing to have children at older ages or not at all. China especially is slowing in growth.