As the notion of "going green" has continued to grow, the number of lifestyle choices and changes we can all make has grown with it (or maybe even a little faster). "Unplug your cell phone charger," you hear, or "eat less meat," all in the name of saving the planet, saving the environment, or some other equally big-picture-type action. But which ones really make a difference?
A professor at the University of Cambridge, Dr. David MacKay, has put together "Sustainable...
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