http://www.instructables.com/living/green/
http://www.instructables.com/id/Bio-fuel-briquettes-compress-paper-pulp-and-sawdu/
http://www.instructables.com/id/How-to-collect-balcony-rain-water-for-free/
http://www.instructables.com/id/5-Things-to-Do-with-An-Old-Shirt/
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