We crack heavy fractions of oil apart to make more useful ones for plastics and other chemical feedstocks and that leaves us so much ethane, propane, and butane

We crack heavy fractions of oil apart to make more useful ones for plastics and other chemical feedstocks and that leaves us so much ethane, propane, and butane that we flare it off as waste gas. You can run vehicles on that, and extract useful work from that heat. We're not going to slow down the amount of plastic we make any time soon.