Water And Water : An Essential Constituent Of The Life On Earth

1657 Words Dec 11th, 2015 7 Pages
Water is a transparent fluid that makes up the bodies of water on the planet Earth and is a major vital constituent of the life on Earth. Water covers 71% of Earth’s surface, but the amount of freshwater is only 2.5% of this amount of water, and 98.8% of the freshwater is in ice and groundwater. Less than 0.3% of the entire freshwater is comprised within streams, rivers, lakes, and the atmosphere (Gleick, 1993). This scarce fluid has been used for a variety of human uses, such as agriculture, drinking, washing, transportation, chemical uses, heat exchange, fire extinction, recreation, food processing, etc.
Although the amount of freshwater is scarce, it is not a limited finite source, but it is not an unlimited renewable source either. Water is a non-renewable source that is re-circulated as potable water through stages in the water cycle, such as transpiration, precipitation, percolation, evaporation, etc. Therefore, the distribution of potable and safe water is limited, compared to the realistic amount of water there is on Earth. Water is fundamental and critical to the proliferation of life on Earth. It enables the role of organic compounds to react in processes that allow DNA replication, protein and RNA synthesis, cell reproduction, cellular respiration, etc. Water also accounts for metabolic process, such as anabolism and catabolism, which dissolve the body’s solutes such as glucose, fatty acids, and amino acids. Water is an inevitable necessity of life on Earth,…
Open Document