> What can I as an individual actually do to stop this?

You've never been responsible for the entire world, that's a defeatist fiction put on your shoulders by people who want you to give up and not take responsibility for your actions.

Take some real time to think about your own actions, your share of the blame. Then begin the process of improving your actions. As a handy benefit, you'll begin saving money, and you can reinvest the savings into more projects that also save money. Eventually your carbon footprint will be a small fraction of what it was and in its place you'll have a pile of money.