I’m certainly not an environmentalist, more of a conservationist, but I think microplastics are a bigger potential long term threat.
Fortunately, I think that a technical solution to that is far more reachable in the next decade or two than the pie in the sky Global Climate Change BS that is being thrown around.
Not a complete solution but I'd like to see us migrate plastic packaging back to coated paper product where possible; create pellet fuel with the used material. Paraffin coated paper makes a heck of a (clean burning) stove fuel. There would be plenty of both supply and demand.
Maybe I am callous but I doubt I would spend a lot of capital on anthropological climate change mitigation.