July 18 -- Renewable energy has struggled to take off in the country. Fed up of federal inaction, 30 states and the District of Columbia have instituted a renewable portfolio standard (RPS). That, of course, leaves 20 states that have not done so.
An RPS makes it incumbent upon a state, or even a country, to procure a certain amount of power from renewable sources, typically within a defined time frame. One of the most stringent standards can be found in California, where one-third of all electricity needs must be met by renewables by 2020. Arizona, on the other hand, has a much more relaxed regime. It aims for just 15 percent of generation through renewables, and that too only by 2025. >>View Article