Maybe I've just watched too much LOTR but wouldn't it be possible to generate enough electricity for the world (plus a bunch of carbon reversers) using geo-thermal energy. I understand the technology isn't ready but wouldn't it be theorretically possible to generate unlimited power by tapping a volcano?
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Science is reinventing play, from extreme sports to gamification to ridiculous roller coasters to the playgrounds of tomorrow, and this issue is chock full of fun. Also, on a less fun note: Did global warming destroy my hometown?