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Cement is the source of 8% of the world's CO2 emissions (2018)

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Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#41

Post by [deleted] »

cameldrv wrote: post #13
ECA_stax wrote: post #7

Earlier quoted context omitted.

this is a much more depressing number. steel and cement are necessary to the development of all nations, designer clothes are not.

This seems unlikely. Clothing is about a $1.3 trillion market, against a world GDP of about $80 trillion. I doubt that an industry that's 1.6% of GDP is contributing 10% to carbon emissions. Also, as pointed out below, the "fashion industry" includes all clothing. Beyond food and water, I'm not sure what would be more necessary than clothing.

[deleted]

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#42

Post by Oricle »

Oh fuck off, big company/industry are alot worse than anything we, the people do.

Has anyone seen the deaths rates of covid now they have started focus on cases and not deaths? Yes, they are non existent! Because they were non existent at the start as well!

Meanwhile, your told to ruin your life, business, relationships, suffer no medical care just because, loose all your liberties and freedom (what little you have left anyways) and just about anything else we haven't allowed to be taken away from us all ready!

If told jump off a cliff would you do it?

Don't answer, it's retoricle, we all ready know you all asked how to jump while doing it by your current actions!

Actions speak louder than words, and the power grab of the isralites over gentiles is pretty much complete. Over 2000 year war is going end in a puff of smoke because your all a bunch of schooled (indoctrinated) brainwashed morons preferring to attack and destroy anyone who speaks truth!

'the more we move away from the truth, the more people attack those that speak it! "

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#43

Post by hinkley »

gogopuppygogo wrote: post #9

I’ve been touting this fact for years. 90% of landfill debris is from demolition. We need more renovation instead of new construction.

I remember a while back reading about work on increasing the recycled content of concrete (using old concrete as aggregate in new concrete, I think?) but I did not bookmark it and none of my last set of searches seemed to be in the right direction.

There’s a Wikipedia page on the subject but little of it sounds familiar, and those bits have no citations.

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#44

Post by Waterfall »

ECA_stax wrote: post #7
aero-glide wrote: post #4

Very interesting, didn't expect it to be that high. Another thing I came across recently : The fashion industry is responsible for 10 % of annual global carbon emissions. Source : https://www.worldbank.org/en/news/feature/2019/09/23/costo-m...

this is a much more depressing number. steel and cement are necessary to the development of all nations, designer clothes are not.

Clothes are discarded but can be turned into rags or donations. Don't feel bad, I bought some very nice stuff for cheap and I didn't hurt the environment more. I'll just drive these wonderful finds I got for $5 30 miles home in my Hummer.

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#45

Post by austhrow743 »

manfredo wrote: post #26
aero-glide wrote: post #4

Very interesting, didn't expect it to be that high. Another thing I came across recently : The fashion industry is responsible for 10 % of annual global carbon emissions. Source : https://www.worldbank.org/en/news/feature/2019/09/23/costo-m...

Statistics on how much CO2 something emits can vary wildly. For instance, meat consumption has high CO2 emissions when you include the CO2 emitted by transporting grain to feed animals. But most typical studies would include that under emissions due to transportation. Hence why you can have some studies claiming meat accounts for a double-digit percentage of emissions while others claim that all agriculture contribut…

I’ve always wondered how much standardisation there is in reporting these types of numbers, particularly with regard to countries, albeit not enough to actually look in to it.

Say Australia digs up some coal, ships it to China, it’s used to power factories and smelters to produce goods, then those goods are shipped to and used by Americans. Is there consensus on who the pollution from burning coal gets tied to? Or does it vary per report and article?

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#46

Post by Waterfall »

hinkley wrote: post #32

I was looking for brick pavers recently and was having quite a time locating actual bricks instead of cement pavers colored badly and textured worse to look vaguely like bricks to nobody sober during daylight hours. I can only assume their target audience is a drunken man, at night, in a rainstorm. I have to wonder why we are still looking for new ways to employ Portland cement at this point, over alternatives. You c…

False. It's common in volcanos. It's why Roman Cement is so good. That, salt water and pig blood.

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#47

Post by kijin »

stanmancan wrote: post #21
treve wrote: post #14

Earlier quoted context omitted.

I don't have the answer, but I can imagine this is hard to compile because so many things emit CO2 all over their supply chain. So the question becomes, when do you consider something the 'final' product in the line. If it's cement, you presumably can't count 'construction' as it would be double-counted. Do you count an iPhone just during production? Or do you include shipping? If you include shipping, you can't have…

I would argue cargo ships don’t need their own category in that case since they don’t exist for any other reason than to be part of the supply chain or other goods. All cargo ship pollution can be attributed to the cargo they’re transporting.

Collapsing all the categories will make it difficult to say things like "Using locally sourced construction materials will reduce our carbon emissions by x%," or "Our new SolarShip(tm) technology will reduce cargo ship emissions by y%, which amounts to z% of global emissions."

We don't need to eliminate categories, we just need to be clever in the way we present data. For example, there's nothing particularly difficult to understand in the statement "Cement is responsible for 8% of the world's CO2 emissions, half of which is from transportation, 1/3 of which is from cargo ships." If we likewise break down each category into its major sub-components, the sub-components can be recombined in different ways to produce a lot of interesting and actionable data. Having several charts side-by-side is much better than fighting over a single chart that doesn't add up to 100%.

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#48

Post by onion2k »

akira2501 wrote: post #12
aero-glide wrote: post #4

Very interesting, didn't expect it to be that high. Another thing I came across recently : The fashion industry is responsible for 10 % of annual global carbon emissions. Source : https://www.worldbank.org/en/news/feature/2019/09/23/costo-m...

That was my biggest take away from the Biosphere documentary, as it was the concrete used in it's construction that eventually led to the abundance of CO2 and lack of O2 in that closed system. We'll clearly have to use something else for building moon bases.

Why would a moonbase need to be a closed system? What would stop it scrubbing the CO2 and venting it in to space?

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#49

Post by kolinko »

akira2501 wrote: post #12
aero-glide wrote: post #4

Very interesting, didn't expect it to be that high. Another thing I came across recently : The fashion industry is responsible for 10 % of annual global carbon emissions. Source : https://www.worldbank.org/en/news/feature/2019/09/23/costo-m...

That was my biggest take away from the Biosphere documentary, as it was the concrete used in it's construction that eventually led to the abundance of CO2 and lack of O2 in that closed system. We'll clearly have to use something else for building moon bases.

I’m not sure you’re right there.

Co2 is released in the production of cement (in cement factories). Once it’s used in the buildings it actually sucks back some of that co2 back during the first years.

In biosphere cement was actually a carbon sink, but it threw the system off balance, because it caused bacteria to eat more oxygen than expected.

https://apnews.com/article/56b7e682362016c1d97f094c2cde4a46

Re: Cement is the source of 8% of the world's CO2 emissions (2018)

#50

Post by josmala »

x86_64Ubuntu wrote: post #18
treve wrote: post #14

Earlier quoted context omitted.

I don't have the answer, but I can imagine this is hard to compile because so many things emit CO2 all over their supply chain. So the question becomes, when do you consider something the 'final' product in the line. If it's cement, you presumably can't count 'construction' as it would be double-counted. Do you count an iPhone just during production? Or do you include shipping? If you include shipping, you can't have…

Why would it be hard to compile? Costs over supply chains are calculated all the time. And we don't have to look at IPhones, we just have to look at the subset of processes that emit non-neglible amounts of CO2 regardless of if they are the final product or not.

The problem is deciding categories, and what to account for what and duplicate accounting of same operation in different sources and differences in accounting and not everybody doing it the exact same way and lack of transparency for sub-components. Think about making steel for wind turbines, or transporting sand for base of wind turbines. Both actions should be accounted on wind turbines co2 emissions, but also they should be accounted for transportation/steel industry and construction. Everything is interdependent. But lets put things in perspective what is ineffective, in Finland home electricity use is 7% of all energy products used in the country, and still people concentrate on that you should make marginal reductions in your electricity usage to reduce CO2 emissions.
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