If you just apply CA's 49% natural gas (according to DOE) to the 45 mpg for 100% natural gas you come up with a gas-burning car needing >90 mpg to be cleaner --

If you just apply CA's 49% natural gas (according to DOE) to the 45 mpg for 100% natural gas you come up with a gas-burning car needing >90 mpg to be cleaner -- well higher than the 70 mpg you calculated vs charging on natural gas -- but easily achievable with hybrids. I feel like there are many people who see 30 coal / 45 nat gas and take offense that it doesn't make EVs sound particularly good. This is why I called it a more honest presentation because EVs in terms of CO2 are fairly bad in WV and marginal in DE or MI or many other places compared to a high-mpg regular car. Instead of taking offense and setting out to correct the record, understand that not sounding particularly good is an accurate view. Even in CA, the mpg needed to be cleaner than EV formulation makes it clear that driving a 100 mpg hybrid for instance is so good that any further gains are of little consequence.