I think the key issue is that if you stop flying, it's a net loss to you with very little marginal gain for the environment since other people will continue to

I think the key issue is that if you stop flying, it's a net loss to you with very little marginal gain for the environment since other people will continue to fly. So only the most environmentally conscious people actually take action, and global warming goes on. If we want things to change, I think we need to change the rules for everybody, for example with strong taxation.