Helium-3 on the Moon for Fusion Energy: the Persian Gulf of the 21st Century

Computer Science

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At the present and anticipated usage rates of energy in the world, the reserves of oil and natural gas will be exhausted by the mid-21st century, with coal reserves lasting up to 50 years more. But there is 10 times more 3He fusion energy on the Moon than in all these Earthly reserves. The potential use of D-3He fusion for energy generation requires a ready supply of 3He, and there is a distinct paucity of this fuel on Earth. However, compared to the Earth, the Moon is a virtual "oasis with springs of solar-wind helium." Conservative estimates of the helium contents of the regolith on a Moon-wide basis are 3.7 ppb (6.7 mg/m3) of 3He for the highland areas and 7.8 ppb (14 mg/m3) for the maria. At the 1998 energy consumption rate and a 50% mining recovery rate, there is sufficient 3He in the upper 3 meters of only the maria of the Moon to supply the entire energy needs of the Earth for over a thousand years. The potential for greatly enhanced supplies of 3He at the lunar poles may make the utilization of this energy-generation process even more attractive.

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