Ozone hole was "just" replacing one chemical with another and changing refrigerator units a bit; CO2 emissions are orders of magnitude bigger as near-everything related to industry or standards of living emits CO2 in direct or indirect way.
My utility generated electric power via wind last year than all customers combined used. Electric cars are obviously taking over. Those are very encouraging signs since a large portion of CO2 comes from electric or transport uses. There are other uses aw well to work on, and some challenges in those areas, but things are looking very good.
