1.) Hydrogen energy company HydroPhi Technology will establish its headquarters in Atlanta.
2.) A new iPhone app called CityMint allows urban residents to order takeout from a public park.
3.) Seven big-picture proposals for dealing with nuclear waste.
4.) How energy-efficient is your house? An infrared map can help reveal your home's thermal performance.
5.) GE is using nanotechnology and carbon capture to "green" the oil sands in Alberta, Canada.