Mark Gilbert for Bloomberg:  The U.K. government is mulling whether to support a 1.3 billion pound  ($1.6 billion) proposal to build a tidal lagoon in South Wales. It should stop dithering and subsidize the project to help meet the country's green energy goals, produce cheaper power, and establish Britain as the world leader in technology that harnesses the power of the tides to generate electricity.

The U.K. lost its energy independence in 2004, and now depends upon imports to meet about half of its energy needs. And while the contribution from renewable energy sources has climbed to a bit less than 10 percent from about 1 percent at the start of the last decade, the U.K. commitment to reduce carbon emissions to 57 percent of their 1990 levels by 2030 means even less electricity needs to come from coal-fired power plants.  Cont'd...