Natural gas burns very clean. I have a gas cook top and water heater because I live in hurricane country. When we lose power, we never lose gas.
Silly Texas resident, there lies the problem, when the power goes out you should be just as miserable as your 'green energy" friends, sheesh, misery likes company and you're just a big ole party pooper! LOL, I too have gas stove, gas furnace, gas water heater and when the power goes out, which isn't very often here, but, when it does go out I can still fire up my stove and cook!