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I do subscribe to the 2012 theory, but regardless of the date, it's hard not to notice that humans are polluting the earth with humans, that soon it'll be difficult to get water to people and find land to grow food on. The infrastructures that hold up cities are going to be harder to maintain, and the resources that make it possible are going to be harder to find. I'm not even talking about oil; I'm talking about, like, steel.