by Tanada » Sat 19 Oct 2013, 08:21:50
$this->bbcode_second_pass_quote('KaiserJeep', '
')It is my opinion that no technology we possess today, or are likely to possess in the near future, is capable of halting or repairing the damage already done, or that soon to be done to the environment. The worlds we live in in space are likely to be very much smaller than that we live on now, and will be easily manageable.
IMO and I know it is just my opinion, engineers have a tendency to look at everything in a mechanistic model formula, just like other peoples dependent on mathematics to do their valuable work. The problem I have with that is mathematics is itself a model of the real world, so you are basing a model upon another model instead of looking at the world itself. We see this kind of thinking a lot when a person trained in Macro-economics talks about the economy, they use terms like over heating and growth as if they were talking about a steam powered van neuman machine that can go too fast but can always increase its own working mass. In the real world it doesn't work like that at all, you can't just enter a new program directive and have everything change in short order. The Economy is in most ways like the Environment, growth requires energy inputs and stability is an illusion, but a quasi-stable disequilibrium that constantly self balances through feedback mechanisms is an optimum result.
Take a patch of land east of the Mississippi and strip it down to the soil, then dump three feet of sterilized beach sand on top to eliminate any seed surviving on the soil surface. What will happen? When the spring arrives in the northern area or immediately in the southern area wind blown and bird dropped seeds will arrive on the site, germinate, root and grow. The early colonizers will be what most humans call weeds, they grow in soil absent even dead organic material. These weeds slow wind and water erosion and also serve at least two other purposes, they catch wind blown dust bringing nutrients to the sand, and they also accumulate root and stem structures that add organic carbon to the soil and that serve as both water retention structures and as living space for micro organisms. In two years the area will be covered in grass with a few shrubs popping up. In five years it will be a lot of shrubs with a few young trees popping up. In 30 years it will be a young woodland with many varieties of trees and shrubbery, open meadow areas of grass, and everywhere it will have rich nutrient packed soil.
The best things humans can do for ecosystem restoration is still, get out of the way. But we are itinerant tinkerers, we always assume we can do better so we try and 'help' or 'improve' the process.
The idea that fully artificial environments are easily manageable without external inputs other than energy is hubris. Show me any successful experiment done in a truly sealed environment and I will take it back. Submarines in the US Navy (and presumably others) electrolyze water to get oxygen for the crew to breath and get their supplies from shore. The ISSA gets regular cargo pods and while they use oxygen generators on board they also leak a lot of very expensive mass into space and deliberately deorbit the cargo pods filled with garbage after they unload the fresh supplies. Do you realize that using a solar powered arc furnace they could use most of that 'garbage' as reaction mass to boost their orbit and not have to use expensive fuel hauled up from the surface to simply maintain orbit against the atmospheric drag? We are so far from actually proving any of the life style choices needed for a self sustaining O'Neil colony wheel it isn't remotely funny. Even the proposed modules for ISSA that would have tested a couple useful concepts never got built or delivered, specifically the balloon habitat that was intended to expand out with inflatable sections to give lots of volume and the centrifugal hab where the Astronaut/Cosmonauts would sleep under artificial acceleration simulating gravity to maintain their muscle mass and bone density to test the idea for long duration missions.
As long as space remains a Political project then politics will rule what gets tested, learned or even built. I was a huge supporter of the SSTO/SSTA projects and Pete Conrad was one of my personal hero's though I never met him in person. I also worked online and through letter writing campaigns to try and get CATS passed in California, to no avail. The technology needed to test long duration space living exists, but the political will to use it does not. Until you can change that nothing will get better.