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Could it also estimate CO2 output from delivery? I always try to buy local even if it's online when possible. Luckily this is usually possible in the bay area/California :)

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That is actually where I was going to start. Tracking the CO2 output for the production of millions of individual items across the internet is hard but I believe there are some services that can estimate CO2 for deliveries based on country + zip.

even if you just did it from "city center -> the address on the postal" -> estimate gas -> CO2 estimation would be useful.

Lots of these suggestions are great, but honestly just focus on the first version.

Great idea tbh

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