Twenty-three states have adopted goals to move to 100 percent clean energy by 2050. State governments propose to retire coal- and gas-fired power plants and adopt wind and solar systems. But these ...

Here’s a quick breakdown: Renewable Energy Focus: Sustainability of the resource (e.g., sun, wind, water). Clean Energy Focus ...

Nearly a third of the electrical costs paid by metropolitan boroughs can be attributed to street lighting. For example, Trondheim in Germany has 21,500 street lights, which in 2006 cost them ...