Plants use their leaves to split water into hydrogen and oxygen. Human technology can do that, too--only much slower. Scientists around the world are racing to find a way to fully mimic the plants, and now one group has made a big breakthrough.
The sun pours down a lot of energy onto the surface of the ocean every day. Now scientists are figuring out a way to get that energy onto the grid, with only seawater as a waste product. It just requires a really, really long pipe.
As the clean energy industry emerges from a challenging period caused by the global economic downturn, it is entering a stage of rapid change in which business models are being transformed against a backdrop of regulatory uncertainty.