US wind, solar tripled over the past decade: analysis

The United States generated three times as much renewable electricity from the sun and wind last year in comparison to 2012, a new analysis has found. 

Seven states alone now produce enough electricity from these sources, as well as geothermal energy, to cover half of their  consumption, according to an online energy dashboard made public on Thursday. 

Just five years earlier, none of these states — South Dakota, Iowa, North Dakota, Kansas, Wyoming, Oklahoma and New Mexico ...