So, those of us with no suede in this race, who will see no reward from the system anyway, are the only people who can be trusted to make change. That means you and I (and I dare say a significant portion of the populace).
It's not obvious what we can do (individual actions taken within the context of a system are dwarfed by structural forces of the system), but we're the only ones who are going to do it. So, let's assume we did fix things, and we're looking back from 2050, doing a retrospective. What things did we end up doing, that got us to that point?
There's nothing you as an individual can do, or even a small group of individuals. This is where government is supposed to work. Using its power to force everyone to do something for the collective good that isn't profitable.
Almost all emissions come from factories. There are only two ways to reduce that -- a global set of rules that increases costs to reduce emissions, and an overall reduction in consumption, via a carbon tax.