Also, food storage in a warehouse is much less energy intensive than a supermarket with warm air con next to open fridges and 500 lumen/inch lighting.
That assumes supermarket orders are fulfilled from warehouses or dark stores which frequently isn't the case.
If it's not the dominant scenario it's still a better one in principle isn't it. What's stopping them from moving more toward delivery from warehouses besides inertia?
@jellybaby started
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Also, food storage in a warehouse is much less energy intensive than a supermarket with warm air con next to open fridges and 500 lumen/inch lighting.