Of course there are other sources of fossil fuel, that is why the greenies had to invent the CO2 scare.
I am old enough to remember when the goal was to make car exhaust nothing but water vapor and CO2 "the harmless gas in soda pop". (and then they showed a soft drink being poured). We are approaching that, so the car haters needed to do something.
The problem is, they have created inevitable doomsday with their predictions. The goal of 350ppm is behind us (~380 now). If you look at the research, the rise of CO2 tracks population growth and to get back to 350 ppm we would have to reduce the population by about 2 billion. I suppose the nuclear war after the destruction of the global economy with this carbon tax would do it.
Shrewd plan huh?
A am not sure what is most arrogant, thinking man changed the climate or thinking we can stop the change by throwing a Hummer in the volcano.
The history of man is a history of mass migrations because of global climate change. Why are we so arrogant as to think we can change that?
