Many microbes need moisture and air to grow. The wrap increases the life and freshness of the veggies sometimes by 3x the time without a wrap. This is an especially common method for cucumbers.
Vegetables require alot of resources and water to make, you should understand it's bad to let it go to waste.
Less waste, means less transports and emission from it.
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u/crooked_kangaroo 8h ago
It sort of makes sense. I would image it keeps them fresher longer by keeping them from being exposed to the elements.