henearkr

35 ms·

451.
by henearkr 4y ago
In this cas it does not. The insects as a whole are in decline.
452.
by henearkr 4y ago
I'd say that it is difficult for me to agree that the honey bee apocalypse is getting any better at all, as, in Europe at least, everybody is deploring a huge mortality in bees, and explicitely pointing the pesticides as culprits. But
453.
by henearkr 4y ago
I have seen an other wasp (I'm in Japan) than the 'giant killer hornets' killing (decapitating) what looked like either another wasp/bee either a bee-looking fly. It was quite a small-scale wasp, a black one with narrow
454.
by henearkr 4y ago
The decline of insects has brought an unbalance that may make some species over-represented as a consequence. But what you are seeing can also be a case of climate change moving the habitats of species around, and make them live where they
455.
by henearkr 4y ago
The whole point of being alarmed of the Bee Apocalypse is that you look at the honey bees as an indicator, just like the lichens on trees are an indicator of air pollution (few lichens mean a bad air quality). When honey bees are dwindling,
456.
by henearkr 4y ago
This is a problem very specific to North America. In Europe, the honey bee has always been there, and is no threat to anything else.
457.
by henearkr 4y ago
It seems like the shipment delay of the parts, as well as the ratio price-of-the-separated-part/price-of-the-part-in-the-laptop are factors. It is not the parts that seem to be expensive, it's that they are more expensive bought s
458.
by henearkr 4y ago
In the category of laptops I thought I'd see the Frame.work in the first place (as it has the best iFixIt index), but instead the place is taken by the P775DM3-G, a Clevo laptop, a brand I had never heard of (the brand is listed as a &
459.
by henearkr 4y ago
Just by curiosity, is there any particular reason why the math and physics teacher job does not make you happy? In my opinion, it is a great work very valuable for the society, and that allows to pass your passion for science to children (t
460.
by henearkr 4y ago
> Fenceposts are cheap. It's a problem of available space (or rather, area ). When you run out of space on Earth (you filled all the deserts, or all the space that would not deprive natural species of their habitat and photosynth
461.
by henearkr 4y ago
Ok, thanks for the clarification about the calculation. (I should have seen that, as a gas stored at 1 bar will not pour out of its container very well) That is fine to employ H2 technology if all is accounted for and the leaks are includ
462.
by henearkr 4y ago
I agree. All I care is that all GHG are accounted thoroughly, including H2 leaks. Then, if at the end we are reducing atmospheric GHG contents at the planned rate, all is fine.
463.
by henearkr 4y ago
As for: > Batteries also leak energy this is not the same at all, batteries do not leak anything outside of themselves, the "leak" you're speaking about is the battery consuming slowly its own chemical potential energy. Th
464.
by henearkr 4y ago
I'm not speaking of power in space, but power produced in space. It can be transmitted to Earth. Also, you speak about vertical solar panels, do you know that then you get a worse efficiency than with slightly reclined panels, which wo
465.
by henearkr 4y ago
Thanks a lot for the references! But do you realize that I was speaking of 20% output and not of a 20% reduction (i.e. 80% output) which makes my speculation worse than what it is actually in the Middle-East? In my opinion, on a huge solar
466.
by henearkr 4y ago
Of course, but my point is do we choose to invest massively in hydrogen planes or in battery planes. Once done the choice it's hard to go back.
467.
by henearkr 4y ago
Please don't say CH4 is "kind of bad". It's an atrocious threat for the planet (and Humanity) right now (thawing of permafrost and of oceanic floor, etc). Be it 11x more potent that CO2 or just 1x, it's completely e
468.
by henearkr 4y ago
Your last statement is false, H2 is a potent ghg, because it removes OH molecules from atmosphere and thus modifies the dynamics of ozone and methane: http://agage.mit.edu/publications/global-environmental-impac... We
469.
by henearkr 4y ago
Ok, my bad then. In which region? I've never seen people shoveling off kilos of dust from their roof like they would do for e.g. snow. For example the wind bringing Sahara dust to Southern Europe only leaves a thin layer of dust, it wo
470.
by henearkr 4y ago
But you don't see dust accumulating indefinitely on roofs, do you? Why would it on solar panels? (granted you install them with a slope and at some height on a pole). As for maintenance of a mechanism, we do not shy away very large off
471.
by henearkr 4y ago
Ok but still, if you build a gigantic solar panel field, and with dust let's suppose it reduces the energy output to 20%, isn't 20% of a huge lot still a huge lot? Moreover there are probably solutions to remove the dust when it b
472.
by henearkr 4y ago
Your question would make sense only if it was a direct greenhouse effect gas, but H2 effect is indirect (but still huge), precisely in the way it disappears by combining with other molecules. The greenhouse effect of H2 is by reacting with
473.
by henearkr 4y ago
> Desert solar will be abandoned in the near future. Why is that? Isn't it the best place to build area-hungry, sun-hungry equipment?? > Orbiting solar, for terrestrial power, will not happen at all. So you don't believe tha
474.
by henearkr 4y ago
Thanks for the thourough estimations! However I strongly advise against buying lead batteries, which are very dangerous for the health and environment (arguably not while they have not yet reached their end-of-life, but once expended a lot
475.
by henearkr 4y ago
So we're down to only a 50% energy density compared to a fuel cell. But the fuel cell uses hydrogen, which leaks inevitably (it slowly diffuses through all materials), and is an extremely potent greenhouse effect gas.
476.
by henearkr 4y ago
I'm sure that the solution is rather storage than cryptomining (to me it looks like the same as just burning the energy into waste heat). For example, molten salt storage.
477.
by henearkr 4y ago
I would say that home batteries like the Power Wall seem like a nice solution. However I am a bit worried about the lifespan of those batteries and what happen to them at their end-of-life (recycling? CO2e cost of making a new one?...)
478.
by henearkr 4y ago
In the short term, THIS is the future I really believe in. Then, a tiny bit further in time, using deserts. And then even further, spatial solar. Edit: this needs a bit of context, where I am living they are erasing whole forests from mount
479.
by henearkr 4y ago
Seems normal to me. "love" is not an ingredient. Even if there was some substance to including this term on the package (actually not the ingredients but rather the process) there is absolutely no way to verify it (any employee th
480.
by henearkr 4y ago
Right, fair enough, but if there were trees regularly everywhere, there would be no huge tree-less (but powerline-ful) area, and between a weird chair-powerline and a nice chair-tree, I guess the choice is easy for a bird. I mean, if there

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