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FRESH WATER
- Share to:
Available Fresh Water.Only about 2.5% of the water on Earth is fresh water, and most of it is stored in glaciers, or ice caps, or deep in rock-strata (aquifers). So only a small part of it is easily accessible. Water is continually flowing: falling as rainfall, running off as rivers, soaking into the ground, evaporating from lakes and wet surfaces, or transpiring from vegetation and, for the purposes of measurement for human use, is referred to as the Renewable Fresh Water Resource (RFWR). At present humans use some 10% of RFWR, but it can be very variable depending on time of year, and on geographical location; also humans must share it with all the other species on earth. Therefore ten per cent of the total available in a particular place may be a prudent level for that country to rely on.
OPTIMUM POPULATION TRUST - Organizational Body
NONE
Management
English
2004
1-11
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