In the same vein, driving gas cars

it should increase int too

If youre talking strictly about emissions being impacted, what youre saying is close enough to accurate, still, it would make a difference, only a small one. The thing is theres a long list of destructive effects of these two industries, therefore, not supporting them reduces there harm in many more ways than just emissions.

Seems to me the two biggest personal changes one can make are related to diet and transportation.

Realize the destructive nature of the animal agriculture industry, as well as the automobile industry and adjust accordingly.

Go vegan, and swap car for ebike. Hopefully inspiring others to do the same eventually.