Osaka University has developed a recycling robot that uses lasers to sort plastics. The project goal is to help lift plastic recycling rates of under 10 percent.
The polite Social Trash Box out of Japan twists, bends, and reminds you to do your part to keep public spaces clean.
A visit to a modern waste-to-energy plant shows they are far cleaner than older incinerators and an alternative to landfills, but shouldn't displace efforts to increase recycling.
Making wind power at U.K. coal mines. Will Google's Dan Reicher be the next energy secretary? Taking the renewable energy industry's pulse in a downturn.