Working with metal.
Imagine there was no metal in your life.
No nails, cars, knives, forks, TV electronics.
Coal is needed to make steel (some can be made in a Bessemer converter, but only for boutique items).
Coal's unique properties have prompted me to set up a new coal-based business - not like or linked to any coal use now.
Just depending on the chemical properties, including ancient accessible carbon and dross.