Natural gas, fusion, water from dams and the force of ocean waves, nuclear, are all better producers for power on the environment than coal. Coal is like prehistoric man shit. Cars can run on water, vegetable oil, and most have been murderd for such ideas just like Tesla was. Big business at it's finest. Hurst made Canabis illegal because it threatened his forest to publish. Bamboo and Hemp are better alternatives for that instead of trees.