There is 78% water on the earth but we are facing a problem of water lack .Why?

Answer 1

Though 78% of the earth are water bodies, as per a study 88% of the water available in the world is from seas and oceans and not potable. Desalination in some areas are done at a very high cost which is only 0.007%, so it is very negligible. Of the balance 12% or less 50 percent of all potable water is wasted or lost in the developing world; Pollution, with some 2 million tons of human excrement and an ever-increasing volume of untreated discharge from industry going into urban water supplies every day. The ground water table is also depleting very fast and getting contaminated or many areas have become dry. This accounts for +3%. The balance of 3 % are so is available now.

In the developing world, more than 1 billion people cannot get clean drinking water, and 1.7 billion people lack access to adequate sanitation facilities. The United Nations says that dirty water causes 80 percent of diseases in the developing world, and kills 10 million people annually.

WATER CRISIS IS LIKELY TO STRIKE MOST DEVELOPING WORLD CITIES BY 2010.

Thus the position is very alarming and water conservation and Storm water harvesting are being implemented by many countries to save the situation.

Answer 2

Key word is "fresh, safe water", and then only in some parts of the world due to drought and/or pollution. Other areas are getting flooded regularly. The rest of the water is sea-water which has too much salt to be used by land-based crops, animals, or humans.

So to make it drinkable, the salt has to be removed. The main natural process is of course rainfaull, but for an engineered solution, the problem is that desalination is a time consuming process, and once the water is purified, building pipelines / aquaducts / canal systems etc. to move the fresh water any significant distance inland is prohibitively expensive.

Answer 3

The reason we are facing the problem of a lack of water is twofold. First off,most of the water on earth is salt water. The amount of fresh water is a very small fraction of the total water on earth.

Secondly, much of our very limited supply of fresh water is being polluted and is no longer good for use. Once contaminants are in water, it is very hard to get them out. They can seep down into the ground and affect the ground water which is what feeds many wells. It can also go down river or stream and enter different bodies of water. The problem is worse when the contamination happens in an elevated area because it then runs off into bodies of water below.

Answer 4

The total amount of water in the world is approximately 1.4 billion km3, of which 97.5% is saltwater. This leaves us with meager 2.5% fresh/consumable water

An extremely large amount of fresh water resources are locked up in the form of glacial ice, permafrost, or permanent snow.

Rather than fresh water being spread evenly around the world, three countries hold the majority of fresh water resources. Brazil is the country with the most renewable fresh water. Russia is second, and Canada is third.

We have a lot of water ... true, but when you look at the stats, almost all the water is not fit for human consumption.

Answer 5

78%of earth is water but only 2%of it is sutable for a living being to drink so there's lack of water as rest of the water is saline

Answer 6

Most of these water is in the sea which is not drinkable. So, there are only a small amount of drinkable water. Most of the component of THAT small amount of drinkable water is being frozen at the north and south pole.
Therefore, we are facing a problem of water lack.

Answer 7

The earth may be 78% water, however, I believe that only 3% of this water is freshwater, or usable. For instance, I I give you 100,000 gallons of water, 97,000 gallons would be unusable, whilst the remaining 3,000 gallons would be freshwater, usable.

Answer 8

Lack of desalinization plants - most are in the middle East because of a lack of inland fresh water in those countries.

Answer 9

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Answer 10

Because most of that water is salty water and we can't drink it. So we have to take care of the small percentage of sweet water.