Over the past few years, I've noticed a sea change (hah) in the legions of climate change denialists. We still have our stubborn hanger-ons to the idea that nothing is changing, there's nothing unusual happening at all, lalalalalala, but an increasing amount of folk that once subscribed to this notion have changed their tune. No longer are they
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"There is no global warming."
"There is global warming but we're not causing it."
"We're causing it but it's not that bad."
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What to do is an odd one. On the one hand, you can help a tiny bit by changing your life. OTOH, you're helping only a tiny bit, and the benefit is spread among everyone while you bear the cost. This is what externalities *are*. If everyone did it that would help a lot, but they probably won't without collective action, like government incentives. As long as you'd vote for, and write letters advocating, such incentives, even though they'd force you to change your lifestyle, I think you're good. If you wouldn't, then you'd be like the other guys with an extra dash of hypocrisy.
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