Elon Musk has become a hero among conservatives for calling out outrageous liberal ideas, but the libertarian-minded billionaire entrepreneur still made clear Friday he thinks continued investment in the fossil fuel industry over green energy is a bad idea. Musk, the founder and owner of the Telsa electric vehicle company release a so-called master plan Friday that outlines his and the the company's future, which calls for a "path to reach a sustainable global energy economy." In the Master Plan Part III, Tesla claims that it will cost $14 trillion over the next 20 years to continue investing in natural gas. By comparison, the company says a 20-year investment on green energy will cost $10 trillion dollars. In the 41-page white paper, Tesla and Musk argue that "a sustainable energy economy is technically feasible and requires less investment and less material extraction than continuing today's unsustainable energy economy."