Have you ever read a greenhouse gas inventory?
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Have you ever read a greenhouse gas inventory?
@evan is that the greenhouse gas part of a lifecycle analysis?
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@beandev That's awesome to hear!
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@evan is that the greenhouse gas part of a lifecycle analysis?
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Have you ever read a greenhouse gas inventory?
@evan The number of "no" is disheartening.
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@evan ah, so it's not
accounting of all GHG per product/service/… emitted in the lifecycle together with other, ideally exhaustive, environmental indicators,
but
accounting of only GHG emitted by a country/city/… (ignoring other indicators) and includes natural sources/sinks and measured over e.g. a year and can be based on production (what a country makes) or consumption (what a country uses, possibly made in other countries, relevant for many rich countries importing a lot)
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@evan ah, so it's not
accounting of all GHG per product/service/… emitted in the lifecycle together with other, ideally exhaustive, environmental indicators,
but
accounting of only GHG emitted by a country/city/… (ignoring other indicators) and includes natural sources/sinks and measured over e.g. a year and can be based on production (what a country makes) or consumption (what a country uses, possibly made in other countries, relevant for many rich countries importing a lot)
@evan then my answer is no, but I skimmed over some and read only the results.
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@tarix29 that's awesome! Thanks for doing it.
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@themediumkahuna thank you for that!
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@evan then my answer is no, but I skimmed over some and read only the results.
@grob that seems pretty legit! You can get a lot of information from a top-line scan or an executive summary.
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@tarix29 that's awesome! Thanks for doing it.
@tarix29 agricultural emissions are tricky, too!
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@grob that seems pretty legit! You can get a lot of information from a top-line scan or an executive summary.
@grob also, consumption-based inventories are uncommon.
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Have you ever read a greenhouse gas inventory?
@evan how does industry self-reporting fit into the inventory?
https://www.nationalobserver.com/2026/03/10/news/methane-emissions-alberta-federal-mou-data
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@evan how does industry self-reporting fit into the inventory?
https://www.nationalobserver.com/2026/03/10/news/methane-emissions-alberta-federal-mou-data
@Django you took a lot of leaps ahead of me. I'm not sure what you're asking.
If you're asking whether self-reporting matters for corporate GHG inventories, the answer is yes. They're almost entirely self-reported afaik. They are also investor relevant information, so it's a big deal if you fake your reporting.
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@Django you took a lot of leaps ahead of me. I'm not sure what you're asking.
If you're asking whether self-reporting matters for corporate GHG inventories, the answer is yes. They're almost entirely self-reported afaik. They are also investor relevant information, so it's a big deal if you fake your reporting.
For local, provincial, and national inventories, it depends. A typical inventory uses some sort of activity data and multiplies it by an emissions factor. So, total number of vehicle kilometers traveled, times a factor representing emissions per kilometer, gives total emissions for transportation.
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For local, provincial, and national inventories, it depends. A typical inventory uses some sort of activity data and multiplies it by an emissions factor. So, total number of vehicle kilometers traveled, times a factor representing emissions per kilometer, gives total emissions for transportation.
@Django especially for industrial emissions, climate data specialists have to collect data from industry (how much steel manufactured, how many cattle raised). For energy use, it's usually numbers reported by the energy companies. So, yes, corporate reporting plays a big part.
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@Django especially for industrial emissions, climate data specialists have to collect data from industry (how much steel manufactured, how many cattle raised). For energy use, it's usually numbers reported by the energy companies. So, yes, corporate reporting plays a big part.
@Django if you're asking about the story you're sharing: that's not actually about a greenhouse gas inventory.
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@Django if you're asking about the story you're sharing: that's not actually about a greenhouse gas inventory.
@evan thanks for the context above, I realized my knowledge gaps seeing your poll after reading that story yesterday.
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@evan thanks for the context above, I realized my knowledge gaps seeing your poll after reading that story yesterday.
@evan no leaps intended, I’m trying to understand the difference between the Inventory and the Federal dataset mentioned in the story.
“The federal dataset is built using a mix of modelling and real-life measurements regularly collected by Environment and Climate Change Canada (ECCC) researchers from sites across the country. Those data include emissions from the entire oil and gas supply chain — from extraction to distribution to final use or export — to paint a really complete story,"
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@evan no leaps intended, I’m trying to understand the difference between the Inventory and the Federal dataset mentioned in the story.
“The federal dataset is built using a mix of modelling and real-life measurements regularly collected by Environment and Climate Change Canada (ECCC) researchers from sites across the country. Those data include emissions from the entire oil and gas supply chain — from extraction to distribution to final use or export — to paint a really complete story,"
@evan IIUC the federal dataset would be part of what is included in the National Inventory
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@evan IIUC the federal dataset would be part of what is included in the National Inventory
@Django ah, I might have misread the story! I thought it was about emissions reductions from adding a new pipeline.
