Water is a finite resource, vital to humans and essential to the
social and economic development. In recent decades, water scarcity began to be of
public awareness, as well as a certain risk of an overall
decline in freshwater resources.
70% of the surface water on the planet is made up of seas and oceans.
97,5% of it is salt water, while only 2,5% is fresh water.
Almost
79% of total freshwater is in form of permanent ice, in polar ice and
glaciers, which is unavailable for usage. 20% of water in liquid is
inaccessible due to the depth in which it is (sometimes 2,000 meters
below the sea level). Only 1% is fresh surface water easily accessible,
what represents 0,025% of water on Earth.
80% of global evaporation depends on the oceans and only 20% of
precipitation over land, feeding lakes, rivers and shallow groundwater.
So, as I told you, water is not an inexhaustible resouse. We must be aware of it.
What do you think we can do to save water....?
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