Coal Miners mine coal out of the Earth. By burning the can we can generate electricity. Coal is easy to find and has a steady amount also its cheap. But sadly it creates pollution it will eventually run out.
Coal in the future Coal would not be a good resource for the future. Coal puts pollution in the air and also it will eventually run out so it wont be reliable. Coal also will be more pricce when we start running out. And of corse it is not renewable
Oil Oil is basically Petroleum,based gases for most lubricants and gases. Gases are reliable and they are efficient (one of the biggest sources of energy)