French scientist has invented a light powered by algae that absorbs CO2 from the air--1 ton per year! The microalgae streetlamp has the potential to provide significantly cleaner air in urban areas and revolutionize the cityscape.
If bringing your canvas bags to the grocery store, carpooling, and forgoing double cheeseburgers makes you feel good about yourself, terrific. But don't expect the planet to notice. What the world needs, says Environmental Defense Fund economist Gernot