Global Warming and Climate Wars

"About 2 years ago I noticed that the military in various countries, and especially in the Pentagon, were beginning to take climate change seriously. Now, it's the business of the military to find new security threats. It's also in their own self-interest, since they need a constant supply of threats in order to justify their demands on the taxpayers' money, so you should always take the new threats that the soldiers discover with a grain of salt. You know, never ask the barber whether you need a haircut.

But I did start to look into this idea that global warming could lead to wars. It turned into a year-long trek talking to scientists, soldiers and politicians in a dozen different countries. I have come back from that trip seriously worried, and there are four things I learned that I think you ought to know."

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