Stranded Assets vs Active Change: Coal vs Hydrogen in Steel Production
https://www.linkedin.com/pulse/stranded-assets-vs-active-change-coal-hydrogen-steel-production

there is real potential for hydrogen technology to replace coking coal. The Materials Processing Institute (MPI), which was established 75 years ago as the British Iron and Steel Research Association, estimates that commercialisation of hydrogen steelmaking technology will be possible by 2030.

The Swedish steel company SSAB aims to replace coking coal entirely with hydrogen and bring fossil free steel to the market by 2026. The Austrian steel producer Voestalpine has invested in the world’s largest hydrogen pilot plant, with an aim to reduce CO2 emissions in steelmaking by 80%. The German steelmaker ThyssenKrupp has conducted trials with hydrogen and aims to commission new hydrogen furnaces in the mid-2020s. The world’s largest steelmaking company, ArcelorMittal, has demonstrated the replacement of coal with hydrogen in the blast furnace. They are also in the process of converting their Ilva works (the largest steel plant in Europe) to use an Electric Arc Furnace (EAF), eliminating the need for coal. The first blast furnace is scheduled for closure and replacement with an EAF as early as 2024. Liberty Steel group, operating largely in Australia and Eastern Europe, has announced that it intends to be carbon neutral by 2030. It intends to achieve this by investment in new hydrogen steelmaking technologies.

38 ℃ (100.4 ℉)
The temperature last Saturday in Verkhoyansk, Siberia. If verified, it breaks the record for the highest temperature ever recorded in the Arctic. (The Washington Post | 5 min read)


https://www.washingtonpost.com/weather/2020/06/21/arctic-temperature-record-siberia/

TADEAS: Je to super, snad se toho doziju. Zatim je to v ceskych podminkach nerealny. IMHO mnohem vetsi leverage daji uspory - zateplovani, mozna i zmenseni staveb (fakt nechapu, k cemu maji lidi dnes mnohdy i >200m2 plochy), fotovoltaika a tam, kde to lze, tak drevo.
JIMIQ: To je cena celyho baraku, pokud ses ochotny leccos udelat sam. Nikdy se to nema sanci zaplatit. Cena dreva je dnes 400korun/m2 vcetne dopravy, cili topeni a TUV (okolo 70-80% veskere energie, co domacnost spotrebuje), muzes poresit za 5000 korun/rok (pri tepelnych ztratach ~8kw). Pokud leto pokryjes fotovoltaikou, tak jeste vic. Ani to nemusi byt pasiv. Nevyhodou je skladovani a pracnost (ta muze byt pro nekoho vyhoda).

Chci tim celym jen rict, ze k udrzitelnejsimu bydleni neni treba high tech ani hodne penez. Staci jen chytre poskladat to, co uz je dostupne a obetovat trochu prace.

Americká aktivistka Erin Brockovichová slaví šedesátiny - Ekolist.cz
https://ekolist.cz/cz/zpravodajstvi/zpravy/americka-aktivistka-erin-brockovichova-slavi-sedesatiny

Patří to sem jen velmi okrajově, ale i tak gratulujeme k životnímu jubileu :-)

https://www.nature.com/articles/s41467-020-16941-y

For over half a century, worldwide growth in affluence has continuously increased resource use and pollutant emissions far more rapidly than these have been reduced through better technology. The affluent citizens of the world are responsible for most environmental impacts and are central to any future prospect of retreating to safer environmental conditions. We summarise the evidence and present possible solution approaches. Any transition towards sustainability can only be effective if far-reaching lifestyle changes complement technological advancements. However, existing societies, economies and cultures incite consumption expansion and the structural imperative for growth in competitive market economies inhibits necessary societal change.

vedecky prokazany a v Nature opublikovany zaver, ze bohati znicili planetu.

Who Is Responsible For Climate Change? – Who Needs To Fix It?
https://www.youtube.com/watch?v=ipVxxxqwBQw


Gates konecne zasponsoroval climate change serii od kurzgesagtu, zde prvni dil, polopaticka videa pro kazdeho (dodelejte nekdo ceske titulky)

Green Heating and Cooling | Hydrogen
https://hydrogeneurope.eu/green-heating-and-cooling

Heating and cooling consume half of the EU's energy. Although this sector aims at being a clean and low carbon energy, 75% of the fuel it uses still comes from fossil fuels (nearly half from gas). The sector is based on a vast, European interconnected gas infrastructure which delivers the needed energy to heat homes in the EU.

If Europe wants to decarbonise heating and cooling it faces several options:
Through the electrification of heating with heat pump or electric heaters or via the introduction of renewable gas such as hydrogen or biogas.

The electrification options are feasible for a number of building (new builds only and that are well insulated and where low temperature heating through the floor is possible) but the majority of the building stock today is not compatible. Moreover, the demand of heat is concentrated in winter time when renewables are less available. Additionally, a complete electrification of heat would imply that the gas grid is no longer used and becomes a stranded asset.

...

There are three ways to decarbonise the gas grid: Green and Decarbonised Hydrogen:

* Green hydrogen through water electrolysis using renewable electricity.
* Decarbonised hydrogen through natural gas reformation with carbon capture and storage.
* By-product hydrogen taken from an unavoidable source of hydrogen which would have been otherwise flared or ineffectively burnt for electricity generation.

The gas infrastructure decarbonisation through the introduction of high share of such hydrogen, firstly through a blending with natural gas and in the future possibly to a complete conversion to 100% hydrogen system is a reality that needs to be acknowledged and pushed for.

Additionally, this enables a greater integration of renewable energy sources and a direct reduction of greenhouse gas emissions. Furthermore, due to the increased share of intermittent renewable energy sources (wind and solar) in the European energy system, the utilisation of the vast gas infrastructure as an energy storage asset is an opportunity (the green gas being used in homes but also in gas-fired power plants (link to sectoral integration).

Hydrogen represents the optimal overall solution for long-term, carbon-free seasonal storage.