But as someone who understands geology, Coal guys, is a waste, the coal that is left for us to harvest is not clean, it is not efficient and it is not worth our time, we will have to destroy mountain tops and rid the U.S. of everything it considered beautiful, If anyone thinks coal is the way to go, then they are ignorant to the different types of coal that exist in the U.S. that being only the low grade...All of the good grade and even high grade coal has been used and destroyed over the last 100 years...The only coal that is left is just the shit that is 70% Sulfar rich and not worth the money it takes to gain it...