Artificial trees do the job of real trees - removing carbon dioxide from the atmosphere.
Airships, similar to blimps, may be the future of cargo transport.
The West African nation of Liberia has partnered with the European Union in a unique attempt to protect its remaining forests by barcoding every harvestable tree.
Learning how to park takes a few weeks, but finding a place to park takes a lifetime.
A new drilling technology is opening up vast fields of previously out-of-reach oil in the western United States. This new drilling is expected to raise U.S. production by at least 20 percent over the next five years. And within 10 years, it could help reduce oil imports by more than half.