I think this is the wrong direction of trying to solve the climate catastrophe - as long as Big companies continue their egoistical greed for money, climate catastrophe will accelerate. As those big companies won’t choose inconvenient but necessary solutions, they have to be forced by the state. If money is even a small amount of motivation, it is greenwashing.
We have to kill capitalism. This is the only solution which lets society focus on society instead of money.