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

An extreme example of this the Sudbury Superstack! (was in service for ~50 years)

http://www.vale.com/canada/en/aboutvale/communities/sudbury/pages/superstack.aspx

https://en.wikipedia.org/wiki/Inco_Superstack