How can one know his power is all "green"? When your house is connected to the power grid it comes from all over. No power company ran a dedicated line to his home. Now if I where to install solar paneling on my property, whatever power I generate but do not use gets put into the grid and my power meter runs backwards. If I give enough back It is possible for me to actually receive payment from the power company. However in New England that would not happen, not enough sunlight. I think what he pays into for "green" is like a state tax question here in MA. Our rate is 5.3% but you have the option to pay a higher 5.65%(the old rate) if you want.. why I have no idea, but the option is there.