The isotope of Helium, which is abundant on the moon, could theoretically meet global energy demands for three to five centuries.
This kind of energy is also expected to be worth trillions of dollars (one expert estimated Helium-3’s value at about five billion US dollars a ton).
There are approximately 1 million metric tons of Helium-3 embedded in the moon, although only about a quarter of that can realistically could brought to Earth.
Since the isotope is not radioactive, it could be used in fusion reactors for nuclear energy without dangerous nuclear by-products.
ISRO is Indian space research organization.