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The Space Trade is a book written on practical business applications for space development.
Whereas colonizing Mars is not desired or practical for business in the first place, trying to colonize Mars does not actually benefit anything. Its a gravity well with no resources worth extracting. Whereas asteroids are not gravity wells that you can blow bubbles with to create housing (space stations) from.
I want the planet earth to be a beautiful garden.
I want the planet Mars to light up in industrial bases.
This might or might not happen during my or your lifetime.
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