To my understanding, water has no nutritional value. It has nothing in it. It’s simply just water.
That said, why is it so crucial to life?
In: 55
99.99% of life on Earth is based on photosynthesis to extract carbon and hydrogen from the non-living environment, and that needs (liquid) water:
CO2 + H2O + sunlight + some dirt -> free oxygen + self-replicating biomass with stored energy
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