After some illuminating discussion on Facebook and some more research (and thought) of my own, I've come to the (admittedly weak) conclusion that humans are certainly affecting Earth's climate via the accelerating use of combustible fossil fuels. The next question is, "what should be do about it, if anything, and when?"

What we might be seeing over the next 100 years, in a nutshell:

(informative summary blog post)


Edit: I’m pretty sure our models of global population predict something on the order of a steady-state 10 billion people before too long (based on historic trends, the observed phenomenon that well-developed countries have lower than 2-children-per-couple birthrates, and the fact that underdeveloped countries are quickly developing).
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