2050 Earth big guess: food production land degradation

Human population is a war game with the Earth, Earth in the end how many people can live to the existing human cognition, but also can not answer, but the decisive factor is too complicated. We can not predict the future, because it is too much depends on our choice of the unknown realm of science and technology. Malthusian population theory in his book, ...2050 Earth big guess: food production land degradation