• humorlessrepost@lemmy.world
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    15 hours ago

    Tell me your secret

    In the US, many stores with food (grocery stores, restaurants) have what’s essentially a crappy pressurized airlock. You go through one set of doors, above which is an outward-facing blower, into a small room with higher pressure, then through another set of doors. The airlock is also often filled with hidden bug zappers, but even without them, insects getting in would be drastically reduced.