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Source: http://web.mit.edu/earthday/

Saturday, April 21 Launch of Working Green@MIT Web site All day
Charles River Cleanup 9:30 a.m. – noon., Meet at Mass. Ave. Bridge (Cambridge Side)
MIT's Environment, Health, and Safety Office Open House 10 a.m. – 4 p.m., MIT Museum N52-496
Environmental Health Science: A Closer Look at Environmental Exposures 10 a.m. – 5 p.m., MIT Museum N52-200, Large Conference Room
Boston Underwater Walking Tour 2–5 p.m., Meet at E51 (Tang Center) lobby
Sunday, April 22 Environmentally Safe Gardening Methods with GreenPort 2:30–5 p.m., Dana Park, Cambridge.
Angels & Airwaves Concert 4–5:45 p.m., MIT Johnson Athletic Center
Talk by TERC researcher LuAnn Dahlmann: Cold Enough For You? 6–8 p.m., MIT Museum N52-200, Large Conference Room
Monday, April 23 to Friday, April 27 The Legacy of Bhopal Photo Exhibit: "We Are Not Flowers, We Are Flames!" MIT Stata Center lobby
Tuesday, April 24 An Inconvenient Truth slideshow Noon, E25-119, RSVP required
Boston Underwater Walking Tour 2–5 p.m., Meet at E51 (Tang Center) lobby
Lecture by Professor William Thilly: Does the Environment Really Affect Your Health? 7–8:30 p.m., MIT State Center, 32-141
Wednesday, April 25 Walking Tour of MIT Green Campus Initiatives 11:30 a.m. – 1:30 p.m., Meet outside on the steps of Stratton Student Center
Lecture on Uncertainties in Climate Forecasts: Causes, Magnitudes and Policy Implications 4:30 p.m., 32-101
EcoExpo: MIT's Sustainability Showcase 5–7 p.m., MIT Stata Center

TSMC lobby

Talk by Boston University researchers: Global Warming, Up Close and Local 6–8 p.m., MIT Museum N52-200, Large Conference Room
Thursday, April 26 MIT Earth Day Fair 10 a.m. – 3 p.m., MIT Stata Center lobby
MIT Solar Decathlon Earth Day Party 5:30–8 p.m., NEXUS Green Building Resource Center, 38 Chauncy St., 7th floor, Boston
Talk on Plasma and the Environment 5:30–6:30 p.m., NW17-218
Friday, April 27 Garden Walk With MIT Facilities 12–1 p.m., Meet at Information Booth in MIT Stata Center lobby