HAPPY EARTH WEEK! SUSTAINABILITY TIP: Wash your clothes with cold water - it saves energy and is better for your clothes! -- Dartmouth Humanitarian Engineering Thayer School of Engineering 8000 Cummings Hall Hanover, NH 03755 <https://www.facebook.com/dartmouthhumanitarianengineering> <https://twitter.com/HumanitarianEng> <https://www.flickr.com/photos/dartmouthhumanitarianengineering/>