The root of all of Earth's problems is overpopulation. Third World countries continue to have extremely high birth rates. Most of these countries can't even afford to feed their existing populace, let alone new births. For a variety of reasons, most forms of birth control cannot be implemented in Third World countries. Natural selection dictates survival of the fittest, hence we have global starvations when the carrying capacity of the planet has been exceeded. Although not a popular option, involuntary sterilization may be the ONLY option.