Global Warming May Require Higher Dams, Stilts - ABC News - SETH BORENSTEIN
The rare Adonis blue butterfly of Britain looked as if it was going to disappear because it couldn't fly far and global warming was making its habitat unbearable. To biologists' surprise, it evolved longer thoraxes and wings, allowing it to fly farther to cooler locales.
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Nevertheless, Hope said failing to adapt would be even more expensive — perhaps $6 trillion a year on average over the next 200 years.
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You too can make up a number.
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