We have millions of people who care, and even if every single one of us produced a carbon neutral footprint(which isn’t possible for everyone) it still wouldn’t stop what’s coming at this point. It would slow it down but not stop it because 100 companies are responsible for 71% of all greenhouse gasses, and only 25 companies and state owned orgs are responsible for over 50% of the global industrial emissions. Without stopping them, you are throwing an icecube on a forest fire.
Hell, the top 1% of co2 producers produce 1000 times more than the bottom 1% which is you and me.