said by 02778712:But how can they really provide you clean fuel power vs fossil fuel power? It's not like there are 2 power lines.
Utilities constantly adjust the generator mix on a second by second basis to match source to consumption.
We have power deregulation here in NH. The green energy rate has a higher percentage of renewable power in the mix. Granted, if you sign up for green power there is no way to know where "your" electrons came from but in total you are contributing green energy to the total power mix.
/tom