Climatic, there is nothing you can do. The vast majority of pollution comes from corporations, not individuals. Try to rally a change in laws, but don't focus your efforts on changing individual people's habits, it's a drop in the bucket.
Yes, corporate activities produce the bulk of human carbon emissions. But they're not doing it out on an island for their own amusement- they're doing it to produce things that individuals buy. (Or that other corporations buy to produce still other things, but it always grounds out in things-made-for-humans in the end.) Saying that oil companies are to blame for, e.g., automotive emissions, instead of motorists, is bizarre.
For example: five years ago it was hard to find more than a single vegan meal option at any given London food place. Fast forward to today, and tons of places have dedicated vegan menus or multiple choices, because of the increase in people willing to pay for them.
I’m not saying it’s a silver bullet, but these things do count, and sometimes changes driven by economic pressures happen very quickly.