Well... in the southeast we have probably millions of acres of trees, much of it in tree farms. Dominion could buy some of the wood and use it to fire wood burning electrical generators. After all, it's "green" and certainly renewable.
It's also a lot of bovine excrement. Sure, those companies want to seem "green", but the bottom line is the bottom line. One of the reasons they are there is because of the price of electricity. If Dominion were to put up a bunch of windmills and cover acres of what could be good farm land with solar panels the price of electricity would go up, and the companies wouldn't like that at all.