Artists unite to record a 'Love Song to the Earth'

Rob Greenfield thrives in a $950 garden shed

Dogs ham it up in photo booth to get adopted

Will environmentalists embrace super PACs?

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DiCaprio's gala for the environment raises over $40M

Pharrell's 'Freedom' video will make you think

George Clooney launches Sentry project to follow the money from Africa's wars

'Farmsteaders': Why family farms still matter

Brad Pitt tells Costco to end cruel conditions for chickens

Malala turns 18, opens a school for girls in Syria

How do you define family?