[only_as_i_fall]

I'm very much in favor of a carbon tax that aims to capture most of all sources of pollution. If you just tax gas you could get into a situation where it's more profitable but more wasteful for example to grow produce hydroponically because diesel is highly taxed but electricity generated by burning natural gas is not.

Just the effect of making less green options more expensive would help, but of course this would be even better if the money collected from such a tax was used to invest in green infrastructure which could balance the original pollution.