Growing Your Own Moon Base
To ISRU or Not to ISRU, This is the Dumbest Question, Dennis Wingo, SpaceRef
“In Situ Resource Utilization or ISRU is the use of materials derived at the location in space that you have traveled to. This is mostly associated with the Moon, Mars, or the Asteroids. Without ISRU there simply is no long term human space program. Why? We simply cannot afford to take everything with us at prices exceeding two hundred thousand dollars per kilogram for the Moon and even more for Mars. Therefore, for any rational human space exploration program, the question is not why but how, when, and where we implement ISRU.”