The Mercury and Moon colonization.
You can reed briefly about the Mercury and the Moon colonization in Wikipedia , . This article poses the question about the economic feasibility of producing helium 3 on Moon and Mercury, as the main space objects that have huge reserves of helium 3. Photo of Mercury was taken from .
Today, it is considered that the Mercury and Moon colonization is economically expedient for the extraction of helium 3, which is virtually unlimited source for thermonuclear reactors, for example, ТОКОМАК.
Don’t forget that helium 3 is the fuel for fusion reactors. Currently, in the Polytechnic University of Madrid (Universidad Politecnica de Madrid) Professor Jose Gonzalez Diez (Jose Luis Gonzalez Díez) was developed and patented the first prototype of reactor that uses as fuel isotope of hydrogen, which can be extracted from water. It opens tremendous prospects for safe nuclear energy from the economic point of view, because it reduces the cost of fuel production. Using laser radiation fuel capacity of 1000 MW scientist got synthesis .
As soon as the reactor prototype will be brought to launch commercially, we have to make changes to the goals of the Moon and Mercury colonization to extraction of minerals, because the extraction and transportation of helium 3 on the Earth would be more expensive than fuel production in earthly conditions.