9 Planetary Boundaries
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9 planetary boundaries are intended to delineate a “safe operating space” for us.
By the way, using a waterless separating toilet helps you to operate inside the boundaries as it impacts different boundaries positively to other toilets.
Source: https://de.wikipedia.org/wiki/Planetare_Grenzen
Photo: https://www.pexels.com/de-de/foto/erde-weltraum-universum-kosmos-5439/
