Most of the U.S. requiring renewable electricity
The idea that the U.S. needs to invest in renewable electricity is still controversial in some circles, with many people still pushing to stick with older fossil fuels like coal or the new fuel on the block, natural gas.
But the U.S. Energy Information Administration notes that while many might argue with the use of renewable electricity, it has become a clear part of the future for most of the country.
One of the key policies in supporting clean energy is what is known as a renewable portfolio standard. These laws require that utility companies and electricity providers produce a certain proportion, or sometimes a certain amount, of electricity from renewable sources like solar power installations or wind plants.
As it stands, only nine states in the southeastern corner of the country, Nebraska, Wyoming, Idaho and Alaska do not have their own renewable portfolio standards.
Some standards are stricter than others. The Database of State Incentives for Renewables and Efficiency reports that California plans to draw 33 percent of its electricity from green energy by 2020, while North Carolina requires only 12.5 percent by 2021. In addition, eight states only have targets rather than requirements, but that still means more than half the country has committed to renewable electricity.