Victor_D wrote:bunnyboy wrote:The problems are the "living standards". You are living better and using more resources than movie star of the age of black and white. The luxuries are becoming norm and then necessities, but we don't need everything we have to live or even to be happy. Fix this and everything else would be "easy".
And how do you plan to accomplish that? Both of us are using computers to communicate now - can we do without them? Hardly, yet for more than a half of humanity, owning a personal computer is pure luxury.
Computers? Why are you bringing those up? The resource hogs are automobiles and climate control. Cars take up perhaps half of the energy used in the US, and those big coolers that you see in supermarkets take so much power that you simply can't stick some sort of surge protector on them. I should know, I asked an HVAC tech who works on them. Computers are low-power devices, which is why your cell phone can go for hours without a charge.
Victor_D wrote:I am positive that if we push for recycling and sane lifestyle really hard, we can reach true sustainability. The problem is this is an option only for countries which already are reasonably developed (I count my own among them, surely to the surprise of many Americans). For the likes of China who are basically trying to mimic the way the Western world used to industrialize itself and get rich in the process, this is a huge problem. China is opening a new coal-fired power plant every week, if I remember correctly, and there are other countries which haven't even started developing (most of Africa included). The problem is, this model won't work in a world of greatly diminished resources. Once these countries increase consumption to approach Western levels, I am afraid it will be the last straw which broke the back of Earth's environmental carrying capacity.
If done smart (and particularly with smart quasi-central planning) it can be made to work. The key is to get most of the population centralized into cities, and use rail as the primary inter-city (and in-city) transport mechanism. Then you add e.g. standardized sorted-trash for the entire place (primarily so that kitchen scraps can be returned to agricultural regions), and require all new construction to use sufficient (very large amounts of) insulation. There are certainly limits to how much this obtains for you, but the US's lifestyle is massively cheaper even if you just systematically add insulation.
The biggie is e.g. water.
Smithy wrote:bunnyboy wrote:I have seen a plans, where you can give the people of Manhattan all they need (thought not what they want) by products of one building. Thought I'm still little suspicious of that.
Ah yes, what you need, but not necessarily what you want. Kinda spits in the face of free choice, and liberty really.
Free choice is not "get what you want", it's "choose what you buy". Different things entirely. Liberty from need isn't liberty to the person who produces.
Smithy wrote:As to Monocultured, I assume you mean a variety of say wheat with very little gene variation? If so, it hasn't seemed to be too derogatory ever since we have began to selectively breed crops. Which as I'm sure you know once you get the results you want, you develop hundreds of cuttings. All genetically identical, but variation will begin to occur quite quickly with cross-pollination from other growers in the area of the seed crop and through natural mutations of the gene code.
Yes, that's what mono-culture means. The current diversity within the major crops is low, which makes it more likely that individual diseases will wipe out huge volumes of food. Theoretically you'll get cross-pollination, but the crops in the neighboring fields will usually be closely related, so it's rather like marrying a cousin. There used to be dozens of common varieties for the major crops, now there's usually
less than a dozen. The vulnerability is obvious.
Trantor wrote:Smithy wrote: the last thing it want's is for it's market advantage to be lost as soon as it goes to market. And then they need to make a profit as to continue their business.
So should we people suffer for the shareholder´s value?
No, people should suffer for the sake of getting what they want, Econ. 101

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Mr Bojangles wrote:discord wrote:a good first step would be self sustainable orbital and lunar colonies, after that move'em to the asteroid belt to get a industry going, after that mars. just my thoughts on it.
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which incidentally requires rather large lift capacity, preferably at a lower cost compared to current practices, see comment in that spaceplane discussion.
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In order to be self-sustaining, a colony would need to be more than just materially- and energetically-independent of Earth. It would also need to be "people-independent", i.e., a population able to be maintain its own growth via birth. With today's tech, we could just about achieve the first two points, but the last is beyond us.
Considering that a major reason for space colonies is to relieve population pressures, not a real problem. Habitat production and launch costs are the big stumbling blocks.
Besides, what you actually need is net-sustaining. As long as the "system" sustains itself, individual "nodes" are a small-scale concern.
Victor_D wrote:3) Asteroids as goldmines are a bit of a sci-fi cliché. We may tap into them if we find something we really need in large enough concentration, but as a rule of thumb, it is better to mine stuff closer to the places with the industry which needs them.
One of the nice things about space is that you can move the industry. Hence why asteroids are considered good mining choices: they let you move to the next asteroid without much complication.
Victor_D wrote:4) Mars is by far the most "habitable" planet besides Earth. It has everything we need to build a self-sustaining civilization which, if need be, could be completely independent on Earth.
Mars doesn't have an atmosphere that we can breath, nor a biosphere that we can live off of. Since we'll have to construct all of that anyways, it's generally agreed that the orbital-colony ideas are better choices.
Victor_D wrote:5) Saturn may be the "Persian Gulf of the Solar System" as Zubrin put it, if we start mining He-3 from its atmosphere and colonize Titan.
Well, it certainly couldn't be that much less practical than Mars. If nothing else, I believe that Titan has a smaller gravity well.
Victor_D wrote:6) Mercury is undervalued. We probably just found water at its poles, which means colonization is possible. I think it will be a nice place for manufacturing anti-matter some time in the future.
The trick is: why would we want to land? The only possibility that I know of is the combination of solar power and minerals, and for that we can just use reflectors to focus sunlight onto collectors at whatever asteroid we're mining.
Victor_D wrote:7) Venus is pretty much useless I am afraid. It's not even worth the effort of trying to terraform it.
Actually, the density of the Venusian atmosphere could make it useful. I don't recall the constituency, but it obviously has volatiles, many of which could be important for space habitats.
Victor_D wrote:8) Large space habitats are in my opinion not a good proposition, because they lack an economic rationale. It makes sense to have zero-g factories, spacedocks, defence installations, things like that, but they likely won't require huge manpower to function. So what would all these people in space habitats do? Unless they were all geniuses selling their inventions, I don't see an economic raison d'etre for them.
They offer basically the same advantages of most of the planets, but traveling between stations is easier than returning to orbit or traveling between distant surface colonies. Meanwhile, everything that we know you can do on a planetary surface we believe we can do on a station as well. You also get easy access to both vacuum and zero-gee, and can physically move your colony if you have a reason (e.g. economics). Space habitats are basically a better option than planetary colonies, Zubrin is just fascinated with the romance.
Victor_D wrote:So, in the short term, I see our expansion in space like this: Earth->LEO/GEO->Moon/Near Earth Asteroids->Mars->Main Belt Asteroids->Outer Solar System->Mercury->?

My list is Earth->Leo/Geo/Lagrange->Moon/Near Earth Asteroid/Main Belt Asteroids->Mars->Others
remember, many Near Earth Asteroids actually follow very elliptical orbits around the sun, so they aren't as easy as they seem. Meanwhile, I don't think the Moon has all that much to suggest itself as a preliminary colony site.