by Stacy Feldman -
Apr 24th, 2008 
This month’s DOE report on the Renewable Portfolio Standards (RPS) in place in 25 states makes at least one thing clear: without them, America’s emerging clean-energy markets would be half as robust as they are today.
The figures: From 1998 to 2007, over 50 percent of the non-hydro renewable energy capacity was installed in states with RPS policies.
Wind power’s role has been huge, accounting for 93 percent of the total RPS additions.
That helped to push America into the number one slot on the list of the world’s biggest markets for new wind turbines.
And led to this conclusion from the report's author:
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