The biggest problem we as humans face is NOT climate change, it is NOT terrorism or islamofascism or whatever, it is NOT poverty. It is (same old same old) population growth.

Here is the figure caption from the article in Science (vol. 315, p. 1501, 16 March 2007) titled "Return of the Population Growth Factor":

The crisis in Niger. "Niger's population is set to increase from 14 million to 80 million in 2050 if current fertility remains the same--an unimaginable scenario in a country already unable to feed itself, facing widespread destruction of local ecosystems through over-grazing, continued mass poverty, underemployment and massive dependence on international aid.…so, without massive investment in family planning programmes, the outlook is bleak."