Population control/growth is one of the major problems on this planet.
In a few decades, the only way to support the population is going to be to start eating bugs (in western world). Only 1% of the water on this planet is fresh, drinking water. Much of if populated. You are going to have some major issues with energy, as well as food and water in the next century. There simply are not enough natural resources to sustain current levels, much less another century of growth.
