Except they didn't even correct correctly. GP said "We need to find ways for people to burn less carbon," which is totally correct. "Carbon" is being used as a mass noun.

I don't know if you are referring about my comment "fewer hydrocarbons", but it was a direct reference to the post I was referring to, "cool way to burn hydrocarbons". I wasn't trying to be pedantic or correcting anybody. Maybe I should have said less, but... I just didn't. The point is simply that higher efficiency doesn't directly equate to more usage; though it can in some cases.

My bad, I misinterpreted the intent behind the emphasis. Sorry :)

That rule only exists for prescriptive wannabe grammarians anyway.