Saving energy and you can save earth, so choose walking the floor instead of taking escalator, such a boring issue. How does technology transform a boring thing interesting?
http://www.youtube.com/watch?v=2lXh2n0aPyw
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Saving energy and you can save earth, so choose walking the floor instead of taking escalator, such a boring issue. How does technology transform a boring thing interesting?
http://www.youtube.com/watch?v=2lXh2n0aPyw