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California high speed rail on track despite uncertainties

DIY prototype proves cheap solar air conditioning is possible

Ewok treehouse goes green

Sustainable development: Al Gore, meet the garbage man

This green building beats the heat

Brazilian designers craft world's most eco-friendly ATM


Lexus 2013 ES 300h hybrid prices at nearly $39,000


Video: Hydrogen fuel cell racer powered by green

Greendex survey ranks US last in sustainability