In this era of gulp-inducing $5-per-gallon gas, the allure of having an eco-footprint smaller than Bigfoot is accelerating at breakneck speed. And let's be honest, there's a lot we could be doing to stop ourselves from breaking the planet...for good. The past few years, the automotive industry has been matching mankind's passion for conserving, offering all sorts of options to preserve our fortunes through better MPGs. From hybrids to electrics to a natural gas car, here's the top-of-the-class when it comes to do-better-mobiles.
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