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Futuristic favela cloud reimagines Rio's Slums

Tokelau Island is world’s first solar-powered nation

Amazing cardboard bike lets you go green for only $9

Evolving a green high-rise

Did Romney torpedo bipartisan wind tax credit deal?

Green affordable housing to break the cycle of poverty


This sleek, tiny home can follow you anywhere

A plug-in hybrid for $3,000?!

Video: Yates electric aircraft sets records

A green getaway amidst a sea of trees and stars