If all US homes ditched the old answering machine (aka e-recycle) for electronic voicemail, 2Billion KwHs of energy would be saved, enough to remove 250,000 cars from the road per year.

(The Green Book: The everyday guide to saving the planent one simple step at a time_Elizabeth Rodgers & Thomas Kostigen.)

reference link: http://www.amazon.com/Green-Book-Everyday-Saving-Planet/dp/0307381358

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