Earth Day
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White, Wealthy and Whiny: An Environmental Movement in Need of a Makeover
Some words of advice for a movement that's moving into middle age
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Earth Day 2014 and Climate Change
Understanding the Intergovernmental Panel on Climate Change and its new Fifth Assessment Report
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Earth Day and My Career Path to Sustainable Energy
How I became an environmentalist and a promoter of passive solar design solutions in the 1970s