The capsules could absorb the greenhouse gas from a power plant's exhaust path.
A special blanket in development could turn piles of plant waste into useful energy.
Disney World gives guests the chance to replicate an iconic moment from "The Empire Strikes Back."
Smog-cleaning clothes could one day be fashionable.
An eco-friendly method could extract millions of barrels of oil and tar trapped in sand.
A molecule acts as a "trap door" for carbon dioxide and could make getting the gas out of emissions easier.