The SpaceX site in Texas will be supplied by at least five nearby gas wells, along with two gas-fired power plants, according to an FAA document. (Bloomberg) -- Elon Musk became the richest man in the world thanks to enthusiasm for Tesla Inc.’s sleek electric cars -- and the company’s stratospheric stock price. But while Musk is perhaps the most well known clean energy CEO, SpaceX, his other company, is likely to rely on drilling for natural gas to power Starship, the new spacecraft and rocket designed to carry humans to the moon, Mars and beyond. Musk’s SpaceX aims to use a site in South Texas to launch rockets to carry people and cargo to the moon and Mars. To do that, the company intends to drill gas wells to make its own fuel and electricity, according a Federal Aviation Administration document seen by Bloomberg.