As water is understandably the most abundant of nature’s resources, it is certainly everywhere; from the peak of the highest mountain to the lowest of the earth’s lows. Naturally water has no taste and is the only chemical substance that exists in three states: Solid,Liquid and Gas. Since it covers roughly 70% of the earth, it is okay to say that Earth is overtly saturated and so should not lack water for any reason unless of course there is a global drought which is scientifically impossible. Our existence depends chiefly on availability of water. Its lack would lead to the extinction of life on earth.
Water is evenly distributed in nature to an extent. Earth’s approximate water volume is 1,338,000,000 km3 (321,000,000 mi3). This is quiet voluminous. Water is found in bodies of water, such as an ocean, sea, lake, river, stream, canal, pond, or puddle. The greatest amount of water on Earth is sea water. Water is also present in the atmosphere in solid, liquid and gas. It also exists underground in aquifers
Can water be scarce then?
Water is renewable. This means it is replaceable and cannot really be lost. Water evaporates from the Earth’s surface and goes up into the atmosphere where it condenses. It then falls back onto the Earth as rain or snow and is deposited in rivers, lakes, porous rock and the ocean. The water will then once more begin the same cycle by evaporating from the Earth’s surface. Water can stay in the atmosphere for up to 9 days, but it can stay in a river for up to 6 months and up to hundreds of years in lakes or the ocean.
Water exist in a sustainable cycle and its usage varies from ecosystem to another in diverse forms and qualities. When water is polluted and abused, it becomes in some cases a threat to life; especially where it concerns organisms that depends on it as part of their everyday diet. Where a given body of water like river which serves a given ecosystem is polluted, consumable water can be said to be relatively scarce. The river itself may harbor diverse life forms that can barely survive in a polluted environment. Remember, there are organisms that strive in polluted water. In some areas, high temperature can lead to total dryness. This means there will be loss of surface water in that area. Drought may follow if this temperature becomes stable over a long period of time. So we must consider its scarcity in relation to its use and catchment area.