Five Best Ideas of the Day: March 31

1. Is the sharing economy opening the door for big business to abuse contract workers? By Jon Evans in TechCrunch 2. With fins off many menus, scientists see a...

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Photo Essays

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Heroes of the Environment 2009

From saving wild mountain rivers in China to measuring the Arctic's icy expanse, from protecting the lush forests of Africa to conducting a feisty online debate,...

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