Live data from Hacker News

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

bbc.com

11–20 of 158 posts

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

#11

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...

So the biggest polluters are food, clothing and shelter - I'm seeing a pattern here...

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

#12

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.

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

#13
post #7

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.

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.

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

#14
post #8

Is there a serious source ranking all global CO2 emissions? Where percentages add up to 100%?

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 'cargo ships' as it's own category.

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

#15
post #7

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.

Garments that are high quality are designed to last and be worn for a long time. High end selvedge jeans might run a couple hundred bucks, but they will last a decade.

I suspect cheap, disposable clothing is driving much more emissions.

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

#16
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.

The overwhelming majority of clothing produced is totally unnecessary. The fast fashion industry produces an insane amount of clothing, way beyond what is necessary for utilitarian purposes. I don't doubt that it causes that much CO2 emission, especially if you factor in the shipping cost from the places that manufacture it.

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

#17
post #6

That’s an attention grabbing headline number, but what it doesn’t tell you is what would alternatives mean in terms of co2 emissions? Let’s say we take cement out or drastically reduce it. Where does co2 sit in increased consumption of viable alternatives.

I'm not quite understanding why the article should present alternatives. That's not what the article is really about. However, the article does present alternatives concerning the company BioMason.

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

#18
post #14
post #8

Is there a serious source ranking all global CO2 emissions? Where percentages add up to 100%?

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.

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

#20

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 don’t think it’s clear at all that concrete wouldn’t work for a moon base. I can definitely at least imagine that there might be some CO2-scrubbing technology that might be practical on the scale of a moon base that wouldn’t be if scaled up to the entire planet Earth.
Post reply on HN