In every case where I've replaced carbon with something else, it's turned out to be preferable. Cleaner, quieter, lighter, longer lasting.
To me, there are lots of other reasons for cutting carbon than the environment. The environment is just a big plus. If we cut all carbon fuel and ended up with longer lasting, more efficient products, but global warming increased, why would I think cutting carbon had been a waste?
Personally, I'd like to see some state where there was a hypercompetitive market of many different energy sources, rather than being dominated by carbon. I'm not sure what that would eventually look like — maybe carbon would be a part, maybe not — but it would be better.
