– How can humidity in the air be measured as a percentage? How much humidity is 100%?
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When you see someone say “80% relative humidity” that just means the air is at 80% capacity of how much water it can hold. At 100% evaporation will be essentially stopped, while at 0%, condensation cannot occur. For reference, maximal humidity doesn’t really go over 5% of the actual composition of the air.
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