"100 companies are responsible for 71% of emissions" is referring to the fossil fuel energy companies. They're responsible for it in the sense that they pulled the carbon out of the ground.
That doesn't mean that if you buy an electric car or replace your oil furnace with electric heat pumps there is no difference being made. They sold it but somebody bought it.
That doesn't mean that if you buy an electric car or replace your oil furnace with electric heat pumps there is no difference being made. They sold it but somebody bought it.