• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
  • přihlásit
    registrace
    ztracené heslo?
    TUHOKlimaticka zmena / Thank you so much for ruining my day
    PETER_PAN
    PETER_PAN --- ---
    Jo u malejch letadel to dava velky smysl uz ted. Znamej co resil rizeni vysokootackovych motoru pro drony atd. rikal ze treba sportovni ultralight uz je elektrickej lepsi nez benzinovej v mnoha aspektech. Mimojine i protoze 80kW elektro-motor do toho ultralightu je velky jako 2,5l pet lahev a odneses ho v igelitce metrem :-) A nemusi se servisovat a ma ucinnost 97%+.
    TUHO
    TUHO --- ---
    resp zas tak hrozne vyznamnej neni, ma 40 letadel, ale pry je to nejvetsi hydroplanova spolecnost na svete .))
    TUHO
    TUHO --- ---
    PETER_PAN: Btw Harbour Air - celkem vyznamej poskytovatel charterovejch letu v Kanade pry jde all electric prave ted.

    Seaplane airline Harbour Air continues to make progress toward making its entire fleet of planes electric by successfully completing its first point-to point test flight in Canada. The eBeaver electric plane flew 45 miles with plenty of reserve power left when it landed.
    Harbour Air began operations in 1982 with two small seaplanes as a service for the forestry industry in British Columbia, Canada, and is now North America’s largest seaplane airline. With over 40 aircraft in its current fleet, the company completes up to 300 scheduled flights per day, including scenic tours and private charters on the West Coasts of Canada and the US.

    Harbour Air completes point-to-point test flight in all-electric plane
    https://electrek.co/2022/08/25/harbour-air-first-point-to-point-test-flight-electric-plane/
    PETER_PAN
    PETER_PAN --- ---
    SHEFIK: Souhlasim. Hlavne penize bohatych vylakat na zaplaceni vyvoje next generation jetu, ktere budou na vodik. Prvni jet-vodikovy letadla budou soukromy jety a az postupne ta technologie probubla do velkych letadel (bude velkotonazni infrastruktura, poptavka, uspory z rozsahu, ...).

    Tam je dulezite kdyz se clovek podiva ne na vodikove jety, ale na potencial vrtulovych (pomalejsich) elektrickych letadel (dava smysl od 400 Wh/kg energeticke hustoty baterie, zatim jsme u nejlepsich pod 350 Wh/kg, predposledni generace Tesly mela 265 Wh/kg - jen BTW) tak to cestovani vychazi s nizsima ekologickejma externalitama nez vlakova doprava. Ale dostat se tam pujde pres kombinaci zprisnovani prumyslovych norem + early adopters u malych letadel.
    A tenhle princip nejak utilizovat i do vodikovych jetu a obecne technologii ktere se ted nevyplati, protoze palit fosil je levnejsi, ale drive ci pozdeji budou levnejsi/dostupne nez cokoliv srovnatelneho predtim.
    JIMIQ
    JIMIQ --- ---
    Feeding Seaweed to Cows Can Reduce Their Methane Emissions | Time
    https://time.com/6119791/seaweed-cows-methane-emissions/

    listopad 2021, nevím jestli zde proběhlo

    In 2020 Australian researchers found that replacing 3% of a cow’s diet with a type of seaweed native to Australia resulted in up to an 80% decrease in methane emissions.
    YMLADRIS
    YMLADRIS --- ---
    YMLADRIS: Ekoložka

    Watching me make a meal looks like an environmental travesty. I almost exclusively use the microwave. I don’t take time to savour the process: a meal that takes longer than ten minutes is one that’s not worth having. It nearly always comes from a packet. My avocados are shipped over from Mexico, and bananas transported from Angola. It’s rare that my food is produced locally. Or if it is, I don’t check the label enough to notice.

    This is the opposite of what seems sustainable. The image we have in our head of the ‘environmentally-friendly meal’ is one that’s sourced from the local market; produced on an organic farm without nasty chemicals; and brought home in a paper bag, not a plastic wrapper. Forget the processed junk: it’s meat and vegetables, as fresh as they come. We set aside time to cook them properly, in the oven.

    I know that my way of eating is low-carbon. I’ve spent years poring over the data. Microwaves are the most efficient way to cook. Local food is often no better than food shipped from continents away. Organic food often has a higher carbon footprint. And packaging is a tiny fraction of a food’s environmental footprint, and often lengthens its shelf-life.

    Yet it still feels wrong. I know I’m doing the right thing for the environment, but there’s still a part of me that feels like a traitor. I can see the confusion on peoples’ faces when they hear about some of my decisions. I feel embarrassed that people might think that I’m being a ‘bad’ environmentalist.

    SHEFIK
    SHEFIK --- ---
    TADEAS: clanek je zamcenej, ale jen me tak napada, nebylo by lepsi jim treba naridit napr. vyuzivat jen carbon neutralni palivo?

    Pac root causem otepleni neni tryskac ani cesta samotna ani smetanka samotna. Navic by se prebytecne panize smetanky alokovaly ve prospech transformace / akcelerace ciste energetiky.
    YMLADRIS
    YMLADRIS --- ---
    Notes on Progress: An environmentalist gets lunch
    https://worksinprogress.substack.com/p/notes-on-progress-an-environmentalist

    Ekologické chování si lidi spojují s tím "jak se žilo dřív". Data ukazují něco jiného
    GLOBETROTTER
    GLOBETROTTER --- ---
    TADEAS:
    SEJDA:
    A co megajchty? Horší mor než private jets.
    TADEAS
    TADEAS --- ---
    on a related note

    Exclusive: How Shell and BP financed Britain’s Cold War propaganda machine
    https://declassifieduk.org/exclusive-how-shell-and-bp-financed-britains-cold-war-propaganda-machine/

    Formerly top secret files show how the two oil corporations bankrolled UK covert propaganda operations during the 1950s and 60s. The goal was to secure British access to key oil supplies across the developing world.
    TADEAS
    TADEAS --- ---
    Global fossil fuel subsidies almost doubled in 2021, analysis finds | Fossil fuels | The Guardian
    https://www.theguardian.com/environment/2022/aug/31/fossil-fuel-subsidies-almost-doubled-in-2021-analysis-finds

    Subsidies for oil and gas production reached a record level of $64bn. The IEA said in May 2021 that no new fossil fuel projects should be developed if the world is to meet its climate goals.
    TADEAS
    TADEAS --- ---
    Burning forests for energy isn’t ‘renewable’ – now the EU must admit it | Greta Thunberg and others | The Guardian
    https://www.theguardian.com/world/commentisfree/2022/sep/05/burning-forests-energy-renewable-eu-wood-climate
    SEJDA
    SEJDA --- ---
    TADEAS: no, jeden vylet tryskacem, 2x 30 minut je asi 1000 l kerosinu, 1500-3000 l topneho oleje pro jeden rodiny dum na sezonu?
    Ja jsem si tedy "cestu za morem" predstavil jako par stovek kilometru. Do Monaka nebo tak neco .. ale je mozne, ze jsem se drzel az moc pri zdi a poleti nekam na jih Afriky? Jizni Amerika? Vubec netusim, kde si smetanka touzi oblect plavky ..
    TADEAS
    TADEAS --- ---
    SEJDA: to imho neni srovnatelne :)
    SEJDA
    SEJDA --- ---
    TADEAS: pokud neomezi vytapeni v zamcich na max 3 pokoje ..
    TADEAS
    TADEAS --- ---
    Soukromé tryskáče na blacklistu? Francie chce utnout miliardářské výlety k moři | Hospodářské noviny (HN.cz)
    https://archiv.hn.cz/c1-67106780-soukrome-tryskace-na-blacklistu-francie-chce-utnout-miliardarske-vylety-k-mori
    RADIQAL
    RADIQAL --- ---
    TADEAS: Kdyžuž…

    Survival of the Richest | Douglas Rushkoff | W. W. Norton & Company
    https://wwnorton.com/books/survival-of-the-richest
    TADEAS
    TADEAS --- ---
    Active citizens: Chráníme klima - program pro aktivní školy, které se zajímají o změnu klimatu
    https://youtube.com/watch?v=HSiqchzZCoo
    Kliknutím sem můžete změnit nastavení reklam