In order to stop climate change, we need to call on less than 300 companies to compensate their carbon emissions. Somehow, this does not seem impossible. The plan: 1) All producers of fossil fuel pay a fee proportional to their production to a global fund.
2) The money from the fund is distributed among the worlds nations on a per capita basis.
3) The carbon price increases with time and with the carbon concentration in the atmosphere. (https://nordborg.ch/2019/12/29/lets-solve-the-climate-crisis-in-2020)