I've become convinced that we will look back at this age where it's acceptable to allow the poisonous exhaust gases from chemical reactions to just flow into th

I've become convinced that we will look back at this age where it's acceptable to allow the poisonous exhaust gases from chemical reactions to just flow into the air around us in the same way I read in wonder about how people in 17th century London use the Thames both as a source of drinking water and as a sewer. My feelings in this regard applies to all in-air combustion btw whether for heating, cooking, transport or any sort of machine.