While nuclear fusion has already been tested with the hydrogen isotopes deuterium and tritium, those reactions give off the majority of their energy as radioactive neutrons, raising both safety and production concerns. Helium-3, on the other hand, is perfectly safe. It doesn't give off any pollution or radioactive waste and poses no danger to surrounding areas.
helium-3 has two prot­ons but only one neutron. When it's heated to very high temperatures and combined with deuterium, the reaction releases incredible amounts of energy. Just 2.2 pounds (one kilogram) of helium-3 combined with 1.5 pounds (0.67 kilograms) of deuterium produces 19 megawatt-years of energy Roughly 25 tons of the stuff could power the United States for an entire year.

The only problem is we don't have 25 tons of helium-3 just lying around. But conveniently, the moon does. In fact, scientists estimate our lunar rock contains more than 1 million tons of the element. The energy stored in that much helium is 10 times the amount of energy you'd find in all the fossil fuels on Earth.
If you put a cash value on it, helium-3 would be worth $4 billion a ton in terms of its energy equivalent in oil.

And such is the new race to the moon. And you thought the Chinese just wanted to play catch up.

Great clip as always Mohir

Thanks Antara

Can't we just grab NASA's moon rocks and use it to power the US for a few years until we go to the moon again?