Why are some industrial chimneys so high, like what’s the difference if it’s 150 or 300 meters?

Question

Why are some industrial chimneys so high, like what’s the difference if it’s 150 or 300 meters?

In: Engineering

Answer 1

It’s the same reason big trucks have exhaust pipes elevated above the truck cab. The marginal benefit of exhausting pollutants at a higher elevation. It’s easier for manufactures to do so than to actually have to develop clean engine tech. (IMO EV when the whole life cycle is considered may not be any better than today’s gas feed engines)