The problem is more than just cement. It’s growth

@jonas7510

7 ай бұрын

amen ! you're that one in a million commenters who gets it .

@joeltell8484

7 ай бұрын

We need more growth

@danielpicassomunoz2752

7 ай бұрын

​@@joeltell8484we need quite the opposite. I.e. global population at 1500's figures

@lupus7297

7 ай бұрын

No it’s cement, if we would just use stone it self which only has 10% the emission.

@LarryMoffett

7 ай бұрын

Even if industrialized countries could attain zero growth, developing countries don't want their populations to live in straw huts and travel on dirt roads.

For DW, this is a bit substandard. The solutions should be the majority of the video. There are many companies developing different materials, started with the Romans

this cement recipe is decades old. there has to be a way to figure out how to use desert sand and other materials.

You can use renewable energy to heat the kiln just not directly but through green hydrogen

@hafizuddinmohdlowhim8426

7 ай бұрын

That is the problem. Green H2 is expensive.

@navalfa7291

6 ай бұрын

You can also breathe hydrogen and release water. You are releasing too much CO2. German Engineers tried to do this in Auschwitz. But history has mistaken their effort. -- Satire Alert. Trigger warning.

I would like to see so more testing with hempcrete. Also maybe a stupid question. Why is that kiln not insulated?

The concrete industry has tried and researched this for 30 years and hasn’t gotten far. We shouldn’t count on them for getting anywhere with their ideas. Therefore it is essential to focus on alternatives from concrete which also have other advantages. After all most people hate concrete…

This reporter is way out of date. The active ingredient in cement is calcium hydroxide (prepared by adding water to burnt lime, CaO). This can be made electrolytically. MIT has been working on the process. Once set, concrete is calcium aluminosilicate plus aggregate.

Check Leilac and saltx solutions are there in final steps of testing to bigger factories for both limestone and cement.

To answer your question, no, unless there are serious incentives. In my career I've found that very few businesses are truly interested in the environment.

@danielpicassomunoz2752

7 ай бұрын

They aren't, as their revenue depends on environment harming technologies i.e. everything from the industrial revolution

Reduce the amount that you are building. In China there is huge housing crisis where it is rumored that even a billion appartments are build and none uses them. Totally insane amounts of new constructions are made globally. If we won't slow that down, we end up missing several elements, not that those that are in concrete. Start this by making more taxes for anyone who owns more that 1 appartment for their use. (Rental etc. if filled with people are still ok.) It is purely insane to allow people have over 3 houses that none really uses.

Making cement does emit a lot of green gas emissions, but the main culprit is the coal energy and agricultural fires - especially in the low income countries.

Geopolymer concrete development status update needed.

Company name is Carboncure is doing good work in this field.

Just checked my cupboards and my wife is well stocked on cacao for Thanksgiving 🤠

China used in the last years more cement the USA and Europe (combined) used ever. :) First step to build "more green" is a better use for concrete, a house/building must not be design to be used for 30 years, but more like 150, and from start close to pasive.

Do I think that the cement industry will stay true to these policies and goals? Not likely, unless they are provided incentives or subsidies that allow them to maintain or increase their profitability. I doubt that for profit business will do much more than make token investments while paying public relation firms to make it appear that they are leading the way to a climate friendly future.

For smaller buildings, calcium-hemp is a feasible alternative. I'm living in one such construction (wooden internal frame), in a housing development with 36 units. It's also carbon positive, as the hemp used is a byproduct from other industries: textile, rope-making etc., all industries that, in their turn, reduce plastics & polymers from the environment.

Or use a geopolymer binder that avoids all of it. Stronger, hydrophilic and won't leach toxins

If renewables like solar and wind can only supply industrial heat up to 500 degrees C, can nuclear power supply the 1400 degree temperatures required by for cement manufacturing? The two largest cement producers/consumers are India and China, and both are committed to rapidly growing their nuclear fleets. Can that help solve the heating side of the problem? The chemistry side is another problem still ...

Replacing the fossil furl powered furnaces to green hydrogen powered furnaces can help in improving the situation.

Every effort at every level will fail as long as we have exponential growth and we will continue growing until we can't. Nature Bats Last.

How painful to see the world becoming more and more a jungle of buildings, bridges, and highways with less open spaces of green and open sky views.

There's actually a new formula for a carbon negative concrete already

Want a Nobel Prize? Figure a way to make cement without heat.

@johnmetz3752

6 ай бұрын

Want to win a Nobel Prize? Develop economic desalinization of water.

@darkgalaxy5548

6 ай бұрын

Want to win a Nobel Prize? Explain the existence of Dark Matter.

Needs too. Well unless you don't mind not having a planet to live on.

There is a hydrogen recipe for cement. It is one of the few really good uses for green hydrogen. The hydrogen could be produced as needed for the kiln with no need for transportation and minimal storage.

Carbon neutral cement? You Germans are nuts.

@christer8964

7 ай бұрын

Just what Anthony McAuliffe said 1944

Why should we be content with carbon neutral? we should aim for carbon negative cement production.

DW what is your agenda when you say it's far away? You mention biomass but not green hydrogen from electrolysis... Which is clearly the solution for now and not biomass. If it can't be carbon neutral then we shouldn't use it. Yeah it will be more expensive and so should all products from hard to abate industries due to their high energy use and co2 emissions.

cement also likely to fail from climate change solution i think work from home more adopt to lower population increase

We need good alternatives.... better alternatives...

@jonas7510

7 ай бұрын

no . we need to stop obsessing about economic growth !

@321findus

7 ай бұрын

Wood.

@devroombagchus7460

7 ай бұрын

Yes, as for any problem.

The other great reservoir of the earths endowment of carbon outside of hydrocarbons.

everything that is man made needs to have recycle incorporated

Make gas out of Co2 and you have the solution and you have a combustible material that only emits water, but no one wants to spend time on ithand-pink-waving

Carbon baist life form is trying to get rid of carbon. Good luck

Did you get Paris Hilton to narrate this?...Valley girl accent

@dominicestebanrice7460

7 ай бұрын

Thank you! I thought it was just me that was irritated by the narrator......goodness gracious that was hideous....for example "mol'en"

@darinherrick9224

7 ай бұрын

Can you like, totally stop hating on the narrator? I mean like, ew! What's wrong with you?

Time to declare victory and move on to capturing CO2 from the air.

Honestly it's kind of surprising nobody as figured out a way to turn atmospheric carbon into buildings. Wouldn't need to be profitable, imagine the subsidies! Governments love a bottomless pit into which they can dump endless amounts of your money into.