Yes, lots of jurisdictions are implementing "percentage by year" legislation that mandates (for instance) 20% renewables by 2020. The industry is trying to unde

Yes, lots of jurisdictions are implementing "percentage by year" legislation that mandates (for instance) 20% renewables by 2020. The industry is trying to understand what all the impacts of this are, and there's a negative impact on reliability when you have a large percentage of unreliable (i.e. you can't guarantee it's sunny or windy) supply in your mix.