[Fiahil]

> imagine that you get a $1,000 bill from Atlassian and want to know the carbon impact of that purchase. We know that for every $1,000 spent with Atlassian, there’s a 30.2 kg footprint

Actually, you don't "know" that, and the tCO2e for every single step in the supply chain is highly dependent on suppliers and situations. You can find an average for manufacturing a single glass bottle in Stockholm, and its shipping to Germany. But what if you used a small, low-carbon, shipping company instead of the regular transit options ? You would not know the proper tCO2e for that unless you already have specific data about this small shipping supplier.

It's completely recursive and mostly information-incomplete.