No question that natural gas burns cleanly. I still have natural gas for heat, hot water and fireplaces - but not cooking. I have solar for the electric and produce 2 MWh more than I use annually. I realize that coal and gas produce the electricity I use at night, so not sure that converting to all electric heat/hot water would actually be more environmental - EXCEPT that leaking methane from oil and gas drilling and transport is a huge component of the greenhouse gas problem, especially as methane is a MUCH more potent (though shorter-lived) greenhouse gas than CO2.Don't forget natural gas. It burns VERY, VERY cleanly. It's not perfect, but it's a heck of a bridge fuel for generating electricity. But, you're right about nuclear. All this talk about solar when the sun, itself, is one giant reactor.
Here in the metro Denver area, our biggest air pollution problem is from ground level ozone. The studies I've seen attribute most of that (80-85%) to burning of gasoline and diesel in automobiles. We have a big oil refinery just north of the city that contributes most of the rest. (That refinery has been operating without a permit for years, due to lax enforcement by the state.) I live in the foothills about 25 miles from the city center and there are plenty of days when I can't see downtown due to the smog. Sometimes, I can't see the Lockheed-Martin plant a mile away. I bought my Bolt after experiencing another one of those days.