from BBC News - World https://ift.tt/2VWT6Te
Monday, August 16, 2021
The zero-power sewage plant inspired by cows
Fifty sustainable sewage treatment plants have been built that work in similar way to a cow's stomach.
from BBC News - World https://ift.tt/2VWT6Te
from BBC News - World https://ift.tt/2VWT6Te
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