U.S. household energy costs hit 50-year low

Photovoltaic solar panels on roof of Honda Smart Home at UC-Davis, CaliforniaSubstantial growth in U.S. renewable-energy capacity will undoubtedly have a positive environmental impact. But the reduction in carbon emissions renewable-energy advocates aim to achieve does not exclude potential benefits to consumers. Because as renewable-energy generating capacity has expanded significantly over the last decade, household...