ECONOMICS (CBSE/UGC NET)

Detailed explanation-1: -The oceans constitute 97.3% of all water sources on the Earth. Thus, the percentage of freshwater sources is only 2.7%. Of all the freshwater sources, only 2.9% of it is available to us in the form of freshwater lakes, rivers, and groundwater.

Detailed explanation-2: -Less than 1% of Earth’s water is freshwater that is easily accessible to us to meet our needs, and most of that water is replenished by precipitation-a vital component of the water cycle, affecting every living thing on Earth.

Detailed explanation-3: -Only about three percent of Earth’s water is freshwater. Of that, only about 1.2 percent can be used as drinking water; the rest is locked up in glaciers, ice caps, and permafrost, or buried deep in the ground. Most of our drinking water comes from rivers and streams.

Detailed explanation-4: -This is so because rest of the water is locked in glaciers, or is not fit for human use or is not accessible . Most of the water is in seas which is salty .

Detailed explanation-5: -Only 3 % of Earth’s water is fresh water. 1 % of this fresh water is fit for drinking, rest is locked up in the ground, glaciers and ice caps.