I was specifically referring to the subset of environmentalists who believe that salvation lies in converting everyone to veganism and cycling. But there are a lot of people who style themselves as environmentalists who oppose carbon taxes:
* The "personal responsibility" environmentalists described above
* The "anti-market" environmentalists who assume without evidence that markets necessarily make things worse
* The Green New Deal environmentalists who largely want to use the threat of climate change as political cover for social spending ("climate justice").
The last bullet might be too broad--there might be some GND environmentalists who are sincere, but certainly the overwhelming majority of GND policy and rhetoric seem to be more concerned with social spending than decarbonizing the atmosphere. I think there's a lot of overlap between this group and the prior two groups as well.