Original sentence: Compared to the other requirements, communication is relatively easy for orbit and the Moon.Due to its proximity and relative familiarity, Earth's Moon is also frequently discussed as a target for colonization.Even if the technology were available, and the costs of deploying a program relatively low, and the likelihood of success relatively high, only a small number of people would directly benefit from a colony (either enthusiastic colonists or high risk commercial interests), leaving most of financing the program to the public.In space settlements, a relatively small, closed ecological system must recycle or import all the nutrients without "crashing.Transportation using off-Earth resources for propellant in relatively conventional rockets would be expected to massively reduce in-space transportation costs compared to the present day; propellant launched from the Earth is likely to be prohibitively expensive for space colonization, even with improved space access costs
Edited sentence: Compared to the other requirements, communication is easy for orbit and the Moon.Due to its proximity and familiarity, Earth's Moon is also frequently discussed as a target for colonization.Even if the technology were available, and the costs of deploying a program fairly low, and the likelihood of success high, only a small number of people would directly benefit from a colony (either enthusiastic colonists or high risk commercial interests), leaving most of financing the program to the public.In space settlements, a small, closed ecological system must recycle or import all the nutrients without "crashing.Transportation using off-Earth resources for propellant in conventional rockets would be expected to massively reduce in-space transportation costs compared to the present day; propellant launched from the Earth is likely to be prohibitively expensive for space colonization, even with improved space access costs