How silly can some people get.
If you don't need coal then don't need steel, copper, aluminum, tin, cars, trucks, airplanes, railroads, kitchen appliances, farms, ranches, buildings, bridges, concrete, asphalt, glue, nails, screws, computers, pens, or paper, and most other things. Without coal you don't have these things.
Cab anyone really be that ignorance, or insane or both to truly believe we don't need coal. Well now we have the proof that such folk do exist, however antiAmerican they choose to be.