Photosynthesis rewired to generate hydrogen | Research | Chemistry World
https://www.chemistryworld.com/news/photosynthesis-rewired-to-generate-hydrogen/4011702.article

Scientists have successfully directed photosynthetic electron flow away from fixing carbon dioxide and towards proton reduction by fusing together photosystem I (PSI) and algal hydrogenase in vivo. Modified algae cells expressing the PSI–hydrogenase chimera produce hydrogen in a light dependent fashion at high rates.


...

Jenny Zhang, an expert in semi-artificial photosynthesis at the University of Cambridge, UK, says that identifying the site on photosystem I where redox enzymes can be fused is an exciting step forward. ‘This will no doubt form the foundation of future efforts to develop algal systems that can efficiently perform a range of solar-driven chemical formation processes, such as the conversion of carbon dioxide into useful feedstocks. The development of such breakthrough systems are still greatly needed in our repertoire of energy production and carbon dioxide recycling strategies.’

...

We are now moving towards trying to find hydrogenase enzymes that are more oxygen-resistant,’ says Redding. ‘The hope is that by using directed evolution, we could force the algae cells to do all this in the presence of oxygen, so that in order to live, they would have to make hydrogen.’

TUHO: dost podobně i Monbiot:
Planet of the Humans, whose executive producer and promoter is Michael Moore, has now been watched 6 million times on YouTube. The film does not deny climate science. But it promotes the discredited myths that deniers have used for years to justify their position. It claims that environmentalism is a self-seeking scam, doing immense harm to the living world while enriching a group of con artists. This has long been the most effective means by which denial – most of which has been funded by the fossil fuel industry – has been spread. Everyone hates a scammer.

And yes, there are scammers. There are real issues and real conflicts to be explored in seeking to prevent the collapse of our life support systems. But they are handled so clumsily and incoherently by this film that watching it is like watching someone starting a drunken brawl over a spilled pint, then lamping his friends when they try to restrain him. It stumbles so blindly into toxic issues that Michael Moore, former champion of the underdog, unwittingly aligns himself with white supremacists and the extreme right.

... the film’s attacks on solar and wind power rely on a series of blatant falsehoods. It claims that, in producing electricity from renewables, “You use more fossil fuels to do this than you’re getting benefit from it. You would have been better off just burning fossil fuels in the first place”. This is flat wrong. On average, a solar panel generates 26 units of solar energy for every unit of fossil energy required to build and install it. For wind turbines the ratio is 44 to 1.

But this is by no means the worst of it. The film offers only one concrete solution to our predicament: the most toxic of all possible answers. “We really have got to start dealing with the issue of population … without seeing some sort of major die off in population, there’s no turning back.”

Yes, population growth does contribute to the pressures on the natural world. But while the global population is rising by 1% a year, consumption, until the pandemic, was rising at a steady 3%. High consumption is concentrated in countries where population growth is low. Where population growth is highest, consumption tends to be extremely low. Almost all the growth in numbers is in poor countries largely inhabited by black and brown people. When very rich people, such as Michael Moore and Jeff Gibbs, point to this issue without the necessary caveats, they are saying, in effect, “it’s not us consuming, it’s Them breeding.” It’s not hard to see why the alt-right loves this film.

Population is where you go when you haven’t thought it through. Population is where you go when you don’t have the guts to face the structural, systemic causes of our predicament: inequality, oligarchic power, capitalism.

Michael and Me – George Monbiot
https://www.monbiot.com/2020/05/11/michael-and-me/

Nové přehrady kvůli suchu? To je naprosto špatný koncept, zlobí se odborník Hruška | Plus
https://plus.rozhlas.cz/...y-kvuli-suchu-je-naprosto-spatny-koncept-zlobi-se-odbornik-hruska-8200875

Radek Kubala
Sepsal jsem recenzi na film produkovaný Michelem Moorem Planeta lidí, kterej je lživej, manipulativní a občas se trefí do něčeho, co by i mohla být smysluplná kritika. Dělá to ale nepoctivě a hanebně.
"Micheal Moore s Jeffem Gibbsem ve skutečnosti natočili dárek pro fosilní průmysl, který ho klidně může začít používat v rámci vlastní propagandy. Jediné věci, které se z něj dají odnést, jsou apatie, demotivace nebo touha po globálním holokaustu. A přesně takové nás chtějí kapitáni fosilního průmyslu mít. Zoufalé a šílené. Nedovolme jim to."

https://denikreferendum.cz/...daroval-dokument-fosilnimu-prumyslu-jeho-planeta-lidi-lze-a-manipuluje

SHINIGAMI: oblibil neoblibil, na levelu random rozumbrada z internetu si ctu ruzny veci a (viz seasonal storage filtr) je to jedna z cest, ktera mi dava smysl -- hodne energie na objem, efektivni propojeni k vyrobe elektriny skrz fuel cells, moznost vysoky miry decentralizace, moznost prepravovat z oblasti kde ma fve/vitr lepsi eroi, seasonal storage, moznost jednoduse rozsirovat uloznou kapacitu. kdyz si predstavim reseni decentralizovany renewable energetiky, nejaka takovejhle flexibilni forma uloziste je klicova.

TADEAS: ok, to je ale prave nekolik veci najednou a je potreba je oddelit

1) do tematu eroei se nechci moc poustet, ale z podstaty veci jeji mereni se zaklada (a musi zakladat) na menicich se faktorech, jako ~ocekavana prumerna zivotnost, ~ocekavana prumerna efektivita, ~pravdepodobne (ne)ocekavana recyklace, jako vstup do dalsiho vyrobku/eroei. ~ocekavany prumerny energeticky vstup na vyrobu.

vsechny tyhle faktory se meni v case k lepsimu a pokud je prumerujeme a delame vedecke prace, tak tam zahrnujeme co bylo / je. pochybuju, ze napr. eroei solarek pocita s tim, ze se zvysi skokove efektivita (vic muj link pred par dny) nebo po 20 letech prevezou do afriky, kde budou na pousti s nizsi efektivitou slouzit dalsich 20 let (velke procento z nich). dalsim prikladem muze byt pouziti dreva na vetrnik, pastoval jsem nedavno. oproti kovu bude eroei mozna nizsi (nevim), nebo se diky recyklaci po jejich zivotnosti pomuze usetrit energie jinde

navic u ropy uhli apod uz se bude pocitat s castecne existujici infrastrukturou, oproti tomu infra pro renewables budujeme/objevujeme, takze se budou energeticky vstupy logicky snizovat. kdyz Ford budoval tovarny, tak taky nejezdily ropny tankery pres pulku sveta, to by tehdejsi eroei dostalo zabrat..

2) presne tak, u fosilu spotrebovavame "baterky", takze eroei je vpodstate pokriveny, protoze nezapocitavame cas a tlak, ktery byl pro tuhle formu skladovani zapotrebi. navic spotrebovavame kvanta vody na ropnych piscich apod. a ziskavat cistou vodu bude stale vic a vic energeticky narocne

3) nemusi jit jen o seasonal storage, tech typu je vic a musej fungovat jak na okamzity, tak na rocni bazi. a jakmile se vybuduje sdilena infrastruktura pro tyhle storage, nemusej se vypinat vetrniky pri prebytcich atd. eroei zase posune jinam.

s densitou ale forma vyroby nema moc spolecnyho, to je jen prostorovej problem - napr. pro auta (nabijitelny ze silnice, vodiku, li-on...), ale uz vubec ne pro verejnou elektrickou sit, kde muzes mit precerpavaci elektrarnu.

jeho tvrzeni "Those who believe that the world will function the same on lower energy density sources like wind and solar should review their old physics text books" je egoisticky a bud by si mel tu knizku precist znovu on, nebo vysvetlit co konkretne se ve svete zmeni. zas tolik toho byt nemusi

Energy storage - Wikipedia
https://en.wikipedia.org/wiki/Energy_storage

Noam Chomsky, Janis Varoufakis, Srecko Horvath a dalsi spousteji platformu, jejiz jednim z cilu je prosadit mezinarodni Green New Deal

Fossil fuel industries are driving us into climate catastrophe — and the world’s working class will be forced to pay for their greed. This toolkit helps you organize to fight for a just transition around the world.
Our future has been held hostage by a handful of oil and gas executives. For decades, they have lied to the public about the dangers of fossil fuel extraction, and bought off politicians to repeat their message. They are internationally organized, infiltrating institutions at both national and international levels to advance their agenda of extraction. Their incredible wealth means their families will be fine, but the rest of us won’t.

https://progressive.international/...ng-for-a-green-new-deal-7af9e89d-542f-44b1-816c-d79745459027/en

Benzin - spalne teplo - 33.6GJ.m-3 = 9.3MWh.m-3

ze smila, energy and civilization

Koukam ze se s tim zli jadernici snazi i neco delat - https://www.nase-voda.cz/elektrarna-dukovany-planuje-ze-snizi-spotrebu-chladici-vody/
Btw. stavajici spotreba uz je vysledek ruznych uspornych aktivit, zjevne jim to nebylo ukradeny ani v minulosti.