"Another 'Inconvenient Truth': Global Overpopulation" by David Biello "Malthusian Dilemma: How to feed a human population expected to reach nine billion by 2050 while also grappling with poverty as well as climate change, dead zones, biodiversity loss and other environmental ills? Solving climate change, the Sixth Great Extinction and population growth... at the same time. By 2050, the world will host nine billion people - and that's if population growth slows in much of the developing