Talking and thinking about the problem and discussing it with others (like this thread, case in point) is good in itself. And local changes can and do influenc

Talking and thinking about the problem and discussing it with others (like this thread, case in point) is good in itself. And local changes can and do influence the behaviour of other people (even though the concept of 'influencer' has taken on various odd connotations nowadays). A lot depends on the environment you live in, but advocating and supporting changes in local transit infrastructure (particularly related to cycling) could match your efforts so far and also have a large measurable effect over time. I don't know if there will be many simple large-scale wins, but another way to make a significant commitment on a long timescale could be to find a career in a renewable-energy related field and then use that as a way to discover more ideas, help renewables succeed, and figure out additional ways to contribute.