The fastest and non-violent way to achieve the most efficient results is through the relative free market, education and voluntary adoption - and through purchasing power, but not through forced purchasing power - nor nonsense tax policy like the "CO2 tax" on all fuel - and therefore all products and transport involved with production and distribution of all products vs. only having a CO2 tax specifically on products from countries who's CO2 emissions are increasing or skyrocketing; penalize weighted based on actual emissions; whether CO2 emissions are actually harmful or not, CO2 can be released without releasing polluting particulate - of which CO2 isn't pollution itself.
Edit to add: use your words folks.