This isn't really an answer to your question, but I am going to keep banging the community solar drum as a good first step (or only step) toward greening your electricity mix.

Think of it like your whole neighborhood getting solar, but instead of having 50 different small installs on 50 different roofs, it's one install in a field nearby. The energy billing is handled with a third company so you won't see 100% of the savings from solar, but your startup expense is $0, maintenance expense is $0, and there's no time commitment. With mine, I pay 10% less than whatever total RIE bills.

I joined the Goat Island solar farm, which is now full. There are other projects accepting people now. https://blog.arcadia.com/goat-island-spotlight/

More official info from the OER here, including a link to the community solar marketplace: https://energy.ri.gov/renewable-energy/solar/community-solar