re: #486 Thanos

The point is that combustion is never a pure process, all forms of it do introduce some forms of carcinogens into the atmosphere, some more, some less. Sometimes it’s oil and gas burning in those cylinders, sometimes it’s water, gas, and oil. Sometimes it’s carbon from the cylinder walls, water, ethanol, and oil at varying pressures and temperatures. It’s not as pure as you spell it out to be.

That is why we now have catalytic converters on automobiles. If the emissions system of a modern automobile is working properly, virtually nothing exits the tailpipe besides CO2 and water vapor.

And modern coal-burning power plants are quipped with scrubbers, too.