I have not looked into Michigan's proposal. Around 2/3 of states have some form of a renewable portfolio standard. Some people think renewable energy means clean energy.

Michigan already has a renewable porfolio. I think it's 10% by 2015. Yeah, good luck with that. Michigan's proposal is to add to the constitution that the renewable energy be "clean":

Beginning no later than 2025, at least 25 percent of each electricity provider's annual retail electricity sales in Michigan shall be derived from the generation or purchase of electricity produced from clean renewable electric energy sources

Read more: http://www.sfgate.com/news/article/Wording-of-the-Michigan-r...

Further, if I'm not mistaken, this would put Michigan at the lead, in terms of aggressiveness of goal. It's even making news in California.

But to your point PSU I believe "biomass" is one allowable resource and one "biomass" is probably landfills. Ironic that clean, renewable energy includes that which would come from making as much waste for landfills as we possibly can?

Paul T.