Helium-3 is in scarce supply on Earth , much more abundant on the moon . Comment: University of Wisconsin team has built a small reactor to show 3He might work as fuel . Former Apollo astronaut thinks U.S. needs new space policy , agency and moon return is vital .
Helium-3 is in scarce supply on Earth , much more abundant on the moon . Used as a fuel for nuclear fusion , there would be almost no radioactive waste . University of Wisconsin team has built a small reactor to show 3He might work as fuel . Former Apollo astronaut thinks U.S. needs new space policy , agency and moon return is vital .