TED's internationally-focused flagship event announces its thought-provoking theme

New book vividly captures climate change in action

NRDC President Frances Beinecke on pro sports going green

Russian photographer captures Iceland's volcanic rivers from above

Whimsical project in Finnish capital combines urban gardening, sustainable design and public transit

Purple haze! Crazy Japanese flower park features tunnel of hanging wisteria

New wind power tech designed with specific intent of saving avian lives