A lot depends on how much you believe their explanation. I don't. In fact, I suspect the person making the explanation didn't know the reason, and either invented what they thought would sound good, or just read something someone else handed them.

Corporations don't have a "central mind" that knows all the things they are doing and why they do them. To get a reasoned answer takes a long time, and usually isn't what they want to deliver anyway.

Since China was already trying to get local chips used rather than NVIDIA, they'll probably be in favor of this move.

Proof positive we elected an idiot. Smart play is to ban drilling, shut down all oil production, and sit on our reserves. Let the rest of the world drain all its oil supplies, in competition with each other. THEN, when everyone else is tapped out, OWN the worlds petroleum markets as a monopoly.

Logistics mark ups as in it costs you $4.37 to ship out and you charged the customer $7.99 for shipping? I could see that being a revenue stream.

A free toy that was popular for a summer and a financial product held by major investment firms (in single digit percentages mostly, just so they may not be left behind in case something good happens) have one thing in common - both have ZERO intrinsic value. They may both be "up" at some point in time, but there is nothing keeping them up but shared belief.

How did you get out of high school without knowing the difference between a hypothesis and a claim?

That's IMHO really overplaying it. I don't want to downplay food production effort difficulty, but saying "because we've never done it we can't" is like saying "Because we've never built a 5-meter-tall statue of a puffin made of glued-together Elvis dolls, we can't". We absolutely can, it's just a question of whether one thinks the investment is worth it. And I'm not talking out my arse, I have a degree in horticulture with a specialty in greenhouse cultivation. So much of the "keep the plants alive" systems we already do on Earth - you just need to get them there in an affordable manner.

The primary consumables are water and fertilizer. Nobody seriously is proposing building a colony that can't produce its own water. As for fertilizer, that would start off as an import, but a much smaller import than the food mass. On Earth, open-loop fert systems are fairly common, but they're slowly losing ground to closed-loop where you just maintain the EC, filter the returning solution, and every now and then due a nutrient-level test on the solution and individually adjust whatever nutrient might be lacking vs. the others.

We can consume lots of growing medium, like disposable rock wool cubes and the like, but we can also not do that. For example, it's perfectly fine to grow plants in clean sand / fine gravel - just clean it and sterilize it between uses. Something like pumice is better, though it slowly breaks down between uses. But you don't have to use anything special.

If you do LED lights, you may get a decade or so out of them. You can reduce shipping mass for replacement by going with designs that let you replace just the light boards from them (Mechatronix has lights like this for example), no need to resend e.g. the heavy heat sink, etc.

There's a million random things you use or that can wear out, from cleaning solutions to solution pumps to climate computers and and on and on. But they're not a meaningful import-mass, at least compared to food. Really, the big thing is fert. But regenerating fertilizer from waste (plant waste, human waste) should not be - industrially - immensely complicated. For the metals, burn to oxides / hydroxides, dissolve in acid, fractionally crystallize. You'll always lose some from the system, but we're not talking large amounts. For nitrates, Haber-Bosch is nothing exotic to adapt, and you have easy feedstocks (mining is complex, sucking in gases isn't).

(To elaborate about PELs: Venus's middle cloud layer is ~1-10mg/m3, depending on altitude, latitude, and what study you trust (our existing data isn't great). OSHA PELs are 1mg/m3 for an 8-hour shift. NIOSH's RELs are also 1mg/m3 for a 10-hour shift, with IDLH of 15mg/m3. Now, this has the two aforementioned caveats. On the downside, Venus's aerosols are higher molarity - 75-85% concentrated vs. ~20% on Earth. On the upside, the vast majority of the PEL/REL/IDLH risk is from inhalation, which obviously, you can't be doing in any atmosphere in our solar system other than Earth. Dermatitis thresholds are far higher. So again, so long as there's not rain/snow/dew/frosts, and you're at the right altitude/latitude combination**, you could probably spend some time outside in shirtsleeves and a facemask, and feel an alien breeze against your skin.

** One also has to stress latitude, not just altitude, as it's cooler for a given altitude as you get closer to the poles. While Venus's middle cloud layer climate is "similar" to Earth's, it's a bit on the warmer side for a given pressure than Earth's - and because an aerostat rides "down" in the atmosphere vs. its internal pressure, esp. at night when it's no longer being heated by the sun, it amplifies the impact. So if you're going to be living in the envelope, you need to find the right balance between how far you want to go below 1atm and how hot you want to have it be outside. Shifting more poleward helps find a better balance between the two (at the cost of lower sunlight availability for solar power vs. the super-bright equatorial regions). It also shortens your effective day (faster superrotation period). You probably don't want to go fully to the poles, though, because of the polar vortices (though how turbulent they are is still an open question).

BS. There's no ozone and at the height these balloons would float the UV and assorted stuff from the sun would fry you in seconds.

They are, however, correct. Venus has no (innate) magnetic field, only a weak induced one (about 2x that of Mars's induced field), but it has a massive atmosphere. The mass of matter over your head at a reasonable habitat altitude/latitude combination is equivalent to that of about 5 meters of water. Way more shielding than is necessary for human life. Of course, having even more shielding would be even better, as it would of course be nice to have Earthlike protection levels. But you could survive even a Carrington Event on Venus. Getting 5 meters of water-mass-equivalent over a Mars habitat, while doable, is quite an undertaking, and means you're living basically in a bunker.

Wtf re you smoking? Archimedes principle holds on Venus just as on Earth. Lose your lifting gas and you sink and on Venus you'll soon start to cook.

Aerostat internal pressures are very similar to the pressure outside of them, and they hold a tremendous amount of gas. A 1 cm hole is basically irrelevant in an aerostat; it's just some extra work for your gas generators, vs. what it already has to overcome due to gas diffusion through the envelope. By contrast, a 1cm hole in a tin-can habitat on Mars will kill you in minutes.

Venus's middle cloud layer is quite similar in most properties to Earth's troposphere, with convection cells, wind speeds, etc seemingly having a similar distribution to that on Earth. There's also lighting, seemingly at roughly Earth levels (though a lot of uncertainty), although we know very little about it, including even where it occurs (incl. whether it's in the middle layer), and why. Because Mars hogs most of the planetary exploration budget :P

Aerostats generally deal better with turbulence than fixed wing aircraft. They interact with it sort of like a ship at sea, with long, slow undulations rather than sharp jerks.

Uhh,, are you crazy?? It's got an atmosphere with clouds of pure acid that snows lead sulfide on a surface that'll melt you face in 5 seconds.

So, this is not only wrong, but it'd actually be more convenient if it were true ;)

Venus's middle cloud layer (the one in question) is actually more like vog (volcanic fog) on Earth. It's not an acid bath, it's a sparse aerosol, with visibility measured in kilometers. The particulates are higher molar than on Earth, but otherwise, it's not a very aggressive environment, and if not for the molarity difference it would be on the order of standard worker PEL levels. You could be out in shirtsleeves for quite a while before you started getting dermatitis (but you would need face protection, both for breathing, and to protect your eyes - not just from the aerosols, but also e.g. carbon monoxide).

(Here I should add the caveat that we don't know if there's any precipitation or dew/frost in Venus's middle cloud layer; it's still a debated topic. We've put so damned little resources into studying Venus, unfortunately, and as a result there's still massive unanswered questions)

Lead sulfide has absolutely nothing to do with Venus's middle cloud layer. It is a (probable) surface phenomenon in Venus's highest regions. The fact that Venus's surface is a natural chemical vapor deposition lab (plus has some interesting volcanic fractionalization / selective thermal erosion possibilities) does, however, raise interesting resource possibilities. The surface, though hostile, was accessible even to Soviet tech developed in the 1960s; much of what we build for industry has to endure vastly more hostile conditions than Venus's surface. The air is so dense that it makes landing much easier than on Mars - it's been calculated that with the right trajectory, you could fire a hollow titanium sphere at Venus, have it enter the atmosphere, decelerate from orbital velocity, and land intact on the surface, without any entry/descent system whatsoever). One probe lost its parachute during descent and still landed intact. The atmosphere is dense enough that you can "dredge" loose material, and fly around with a small metal bellows balloon (controlling flight with small winglets), and return to altitude with a phase-change balloon.

(There is - probably - a metal in Venus's middle cloud layer, but it's small amounts of iron chloride, a soluble salt)

As for the comment I made earlier about how it would be easier if the middle cloud layer had more acid: sulfuric acid is a resource to a Venus habitat. While it's not needed for lift (lift on Venus can be done with just normal, breathable Earth air, with about half the lift of helium on Earth - you can live inside your envelope, with N2 straight from the atmosphere and O2 made from CO2), H2SO4 is your main source of *hydrogen*. Specifically, heating the aerosols first releases free water vapour. Further heating splits it into SO3 and more H2O. You can then further heat the SO3 over a vanadium pentoxide catalyst to split it to SO2 and O2, or you can inject the SO3 into the front of your scrubber to help extract more free water vapour (it's not all in the aerosols) .

Hydrogen is needed not just for your habitats's water needs (note: gases will always slowly permeate in and out of your envelope, it's not a closed system), but also for propulsion for ascent stages and for producing polymers (including the envelope itself). Ascent stages need lots of hydrogen, unless you go hydrogen-free (carbon monoxide, cyanogen, etc), but these have either poor ISP or big problems with things like toxicity, stability, and/or esp. combustion chamber temperature); even "low hydrogen" fuels like acetylene, diacetylene, H additives to hydrogen-free props, etc still need massive amounts of hydrogen to reach orbit. Chemical rockets would need to be at least two stages, be recovered by balloons, hang and be manipulated from the bottom of the envelope, and would take up the majority of your lift capacity. Far more realistic are nuclear thermal rockets - while they burn pure hydrogen, they're so efficient at it that they don't use that much, they give you SSTO capability, and a number of designs can allow for propellantless atmospheric flight / hover (for easier docking).

Your three limiting resources are hydrogen, fluorine (from HF in the atmosphere, but there's not that much HF in the atmosphere if you plan to use a lot of fluoropolymers), and "metals" - the latter being limited by how much you're dredging or digging the surface (with the exception of small amounts of iron from iron chloride).

BTW, hydrogen on Venus isn't the same as on Earth - it's over 2 orders of magnitude higher deuterium percentage (H+ was lost via the solar wind). Probably not high enough to be a health threat, but high enough to be a resource. If you store energy via reversible fual cells/electrolysis, you can wire them in a cascade to separate deuterium every time you charge and discharge. Fuel cells and electrolysis have quite high separation factors for deuterium. At about $1k per tonne, deuterium wouldn't be a viable export commodity at *current* launch pricing, but if launch costs get down enough, it certainly could become one. The other thing Venus has in abundance is power - both solar (though it depends on your latitude and altitude), and of particular note, wind between different altitudes. If you hang a winged wind turbine off a long cable from the main altitude, having it fly many km lower or higher than the habitat, you have a nonstop, quite intense wind differential to generate from.

Yeah, this report reeks of the people promoting Lunar exploration in order to mine Helium 3: a solution in search of a problem. They already have the thing in mind that they want to happen (in this case, settle Mars) and are searching backwards for a means to justify it.

In no way, if the actual goal is "studying life", will $100B buy you more results by sending humans than by sending robots, and nor will it shorten the schedule.When you put humans into the mix, suddenly all of the resources for your project end up going to delivering, sustaining, and retrieving that "smart hammer" you're sending, rather than the actual scientific equipment.

I'm not saying that there can't be good justifications for settling other planets - their can be. Musk's is the most defensible, IMHO (that it's a long, slow, expensive project, but is needed to learn how to make this rare thing (consciousness) redundant against natural and manmade disasters (the latter risk of which grows every year), and we never know how much time we'll have left to do the very-long project needed to do so. Though Musk IMHO grossly downplays the timescales and costs for true resource-independence (or rather, independence to the degree that *if necessary*, it could develop full resource independence on its own, even if shipments of key supplies from Earth are more efficient), and his "quick terraforming" notions are fantasy.

He's listed like a dozen things that he wants to pay for with the tariff money, each of which would individually consume anywhere from "a large minority of it" to "more than all of it".