I didn't read all comments (they are a lot), so I'm not sure if smenooe already mentioned it, but the distance to the production site is not the only disturbing thing, when food transports are involved. For example, if you buy ready to eat prawns at the north sea coast of germany, they might be from the same coast, but still traveled thousends of kilometres, because after they are taken from the sea, they are sent to marokko, where they are processed ( shelled ?, not sure about the english here) and then they are sent back to be sold as a local food.I'm not sure if it is even possible to consider all facts needed to effectively reduce carbon costs, but your sticker collection surely is a way to improve consciousness.
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