It has already started.
http://www.biologicaldiversity.org/programs/biodiversity/elements_of_biodiversity/extinction_crisis/
"We’re currently experiencing the worst spate of species die-offs since the loss of the dinosaurs 65 million years ago. Although extinction is a natural phenomenon, it occurs at a natural “background” rate of about one to five species per year. Scientists estimate we’re now losing species at 1,000 to 10,000 times the background rate, with literally dozens going extinct every day [1]. It could be a scary future indeed, with as many as 30 to 50 percent of all species possibly heading toward extinction by mid-century [2].
Unlike past mass extinctions, caused by events like asteroid strikes, volcanic eruptions, and natural climate shifts, the current crisis is almost entirely caused by us — humans. In fact, 99 percent of currently threatened species are at risk from human activities, primarily those driving habitat loss, introduction of exotic species, and global warming [3]. Because the rate of change in our biosphere is increasing, and because every species’ extinction potentially leads to the extinction of others bound to that species in a complex ecological web, numbers of extinctions are likely to snowball in the coming decades as ecosystems unravel. "
I'm glad this clip mentioned how food scarcity and displacement from drought leads to war. This is already happening and can be observed to peak in years of extreme climate events, like El Niño years.
http://www.earth.columbia.edu/articles/view/2842
If you think the GOP is xenophobic now, wait until countries south of the US lose the arable land needed to sustain their populations.
= new reply since forum marked as read
