Energy comes from many sources, and to describe these sources we use two terms: renewable and non-renewable. Non-renewable energy resources cannot be replaced – once they are used up ...

The National Renewable Energy Laboratory has its roots in the 1970s oil crisis. In 1974 President Gerald Ford signed a bill ...

Once fully completed, the center will be able to power 110,000 homes and invest almost $50 million in Navajo County; the site also helps APS rely less on non-renewable energy sources.