Planet earth has a population of 6 billion people now, which is expected to increase to 8 billion by 2020. This will lead to two problem, one will be reduced availability of precious metals like titanium, tungsten, molybdenum and even the conventional materials. Also, the per-capita living space will also reduce. To counter this situation, we need space mining. This could be done in moon, which in between mars and earth. Mars will be the habitat and moon will be the factory having zero gravity. Terra farming will be required to make mars fit for habitat.