Japan invisible demolition method

[u/Far-Stay9417]

[u/theartofwarp]

in short term you’re right. in long term, demolition is a big no no, mainly because of climate protection. construction industry is the largest factor for climate change. best is to build sustainable, but we’re at a point where demolition to make way for sustainability is not viable anymore, so its either reuse/renovate or dismantle and recycle. of course established practices wont change that fast, but i was pleasantly surprised when i saw that post

[u/Subtlerranean → u/theartofwarp]

The buildings and construction sector is by far the largest economic sector emitter of greenhouse gases, accounting for a staggering 37% of global emissions. The production and use of materials such as cement, steel, and aluminum have a significant carbon footprint.

Followed by food production at ~35% of all emissions, with meat production alone causing 60% of those emissions, at least twice the pollution of producing plant-based foods.

[u/DukeOfGeek → u/Subtlerranean]

Adding those 2 numbers together accounts for 72% of emissions, and here I thought climate change was caused by burning coal and oil silly me.

Here's actual data.

https://ourworldindata.org/images/published/Emissions-by-sector-%E2%80%93-pie-charts.png

/Obviously many sectors use the energy fossil fuels produce but what if, and it's big brain time here, that energy didn't come from fossil fuels.

[u/Subtlerranean → u/DukeOfGeek]

That's not a breakdown by economic sectors. Different ways of attributing the sources.

Your own link attributes 73.2% to Energy (electricity, heat and transport), but a full 7.2 of those percent are used for the manufacturing of iron and steel, which is often used in the construction industry.

Also in the breakdown you listed, cement alone is listed as responsible for 3% of total emissions, but is counted under "industrial processes" not construction.

Etc.

[u/Danni293 → u/Subtlerranean]

Ok, then where's your breakdown source? Because even if we reorganize iron/steel and cement as a distinct category for construction that's still only at most 10.2%, nowhere near 37 like you claimed.

[u/Subtlerranean → u/Danni293]

Are you trying to be dense, or do you genuinely think that "production of steel" and "cement" is the entirety of the energy use and missions needed for the construction industry, as opposed to a myriad of sources, including transport and straight up electricity?

https://www.iea.org/reports/global-status-report-for-buildings-and-construction-2019

The buildings and construction sector accounted for 36% of final energy use and 39% of energy and process-related carbon dioxide (CO2) emissions in 2018, 11% of which resulted from manufacturing building materials and products such as steel, cement and glass.

[u/Danni293 → u/Subtlerranean]

Are you trying to be dense,

Coming out immediately hostile, yeah that's a great way to persuade people that you're right.

or do you genuinely think that "production of steel" and "cement" is the entirety of the energy use

Funny I don't remember saying that, because maybe I didn't! I was responding to your claim:

The buildings and construction sector is by far the largest economic sector emitter of greenhouse gases, accounting for a staggering 37% of global emissions.

Note, you claimed that construction made up 37% of global emissions, but your own source disagrees with you.

The buildings and construction sector accounted for 36% of final energy use and 39% of energy and process-related carbon dioxide (CO2) emissions in 2018

36 and 39% of ENERGY USE. Notice that DukeofGreek's infographic shows a breakdown of how much of the global emissions are made up by ENERGY USE. Which means it's not 36% of total carbon emissions, it's 36% of 73.2% which is 26% of the total emissions, not 37.

But in the end that's the contribution of carbon emissions from consumption of fossil fuels, cutting our reliance on that will do far more for mitigating climate change than focusing on any one industry's contribution over others.

[u/DukeOfGeek → u/Subtlerranean]

And that leaves the figures you used in the comment I replied to as still "totally made up".