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A great way to start living green and make some extra cash at the same time is to start recycling all of those aluminum cans instead of throwing them away.  The wife and I invested in a small, hand operated, wall-mounted can crusher.  We now store our aluminum cans and bring them in to a recycling center. Go Green, Live Rich: 50 Simple Ways to Save the Earth and Get Rich Trying

Not only are we helping the environment, we get paid to do it!