It's not always easy to find the options, of course. You may have to sift through your power companies website to find them. My own power company, CL&P, let's customers know about these options every couple months with colorful informational inserts included with the bill: most people I know do not read these, and remain unaware that they have these options until I point them out. So chances are that you have the options, too, even if you don't know about them.
Here in the river valley where I live all our power was Hydro, until CL&P was swallowed by a larger company and became a distributor rather than a supplier & distributor. When I switched my supplier to Community Energy, which in CT offers 66% Wind Power and 34% New England Small Hydro, I wanted to support the creation of more wind farms with demand, but I did wonder if it was the best choice to reject my local hydro suppliers. Imagine my surprise recently when I found a tool from the EPA website breaking down my zip code's general power sources for the default CL&P user: only 6% hydro. Despite the fact that there are two hydro plants within 5 miles of my home, most of the power came from Nuclear, Gas & Coal sources. So, I am increasingly glad that I chose Community Energy, which supports both local hydro and new wind power.
Of course, someday I would love to have a geothermal & solar based home. But for now, in my small cottage that is on-grid, I am happy to be part of the greening of America. Because it will happen as we, the citizens, demand it. When you go off-grid, you gain self-sufficiency, but you lose your voice. The power companies write you off, and turn to other customers...
What about you? Have you looked into green power in your area? Do you supply some of your own energy?