Greening your lifestyle is tricky, but greening your auto is downright complex. Should you switch to electric? Is a hybrid good enough? And just where can you get biodiesel these days? It's enough to make even the eco-friendliest heads spin. But have no fear. Popular Science knows that switching from fossil fuels requires some ingenuity, and we've culled some tips to make the, uh, ride smoother.
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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?