i think we have coal burner but no
steam power plant my idea is to add a new building powerful this one use coal and water to product atmosper
need for the medium verssion 2X2
5000 ore
10 000 steel
1 000 gold
5 000 water
1 000 coal
product 1 000 power
store coal(5 000)

need for the big version 4X4
20 000 ore
40 000 steel
5 000 gold
50 000 water
10 000 coal
product 10 000 power
store coal(20 000)