When I see a car's exhaust pipe and a factory's chimney emit that toxic cloud of black smoke that will poison the air and warm the world, I can't help thinking. Couldn't that gas actually be useful in some way, instead of putting us all in danger? Maybe we could use it as a source of electricity or fuel or something. After all, don't you think that it's about time we actually found a use for exhaust gas? Think about it. It'll be good for the environment, and for that matter, all humankind.
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