If there is a chioce between paper towel or electric hand dryer - I will do paper towel. How may people use the restroom without washing their hands! I use the paper towel to shut off the water and then grab hold of the germ causing door knob.
Letting your car idle before driving just wastes gas. Racing your engine to make it 'hurry up and get warm' will do more harm than good. The engine will warm up in a matter of minutes, once you start driving. Just start it up, and go!
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13 Ways to Go Green: The Reader's Digest Version
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