Governments implemented one very powerful regulation namely that companies mining for fossil fuels needed to phase out their production by 25% over 10 year periods. This has set the right incentives. The price of fossil fuels rose, alternatives became more popular. It set the right incentives for investors to invest in climate friendly energy and the higher demand for climate friendly products and energy drove down production costs and increased demand. In the past governments set many different regulations, making the whole climate change story complicated, whereas ultimately it was the CO2 that was stored in the earth that made it into the atmosphere that caused the warming of the earth. Climate change is solved by keeping the fossil fuels in the soil and the subsequent economic incentives this provided for entrepreneurs to provide climate neutral alternatives.