Book excerpt: He explains step-by-step how we can use present-day technology to send humans to Mars within ten years; actually produce fuel and oxygen on the planet's surface with Martian natural resources; how we can build bases and settlements; and how we can one day "terraform" Mars - a process that can alter the atmosphere of planets and pave the way for sustainable life." "Under Dr. Zubrin's program, a human mission is only the first step toward a day when research bases and eventual colonies can be developed on Mars' surface. Mars possesses enormous chemical and mineral resources, all of which can be put to use in pursuit of travel, exploration, structures, and a variety of human activities on a planet that is neither as harsh nor as unreachable as we popularly believe." "The Case For Mars is not a vision for the far future or one that will cost us impossible billions. It is a plan that can be put into action today if we are willing to rethink our traditional methods and costs.