A new technique uses microwaves to cheaply convert used motor oil into fuel.
This conceptual habitat would support a floating city with a half million residents.
A novel cloud-based system aims to teach old hardware new tricks, virtually.
People who live in big cities are more likely to act in "green" ways, such as recycling, finds a study.
Chlorine has a dark side, but giving it up is proving difficult.
A "phenomenal" artist makes his own rainbows from reclaimed rainwater.
In many states, it's unlawful to toss out your old electronics.
In many states, it's unlawful to toss out your old electronics.
Recycling doesn’t come free. It costs millions of dollars to pickup, sort and process all those plastic bottles, aluminum cans and cardboard pizza boxes.
Kiss plastic trash goodbye. British engineers have new tech to recycle it all.