ABSTRACT
Nutrients are the elements essential for the growth, propagation and activity of plants, animals, even aquatic species, and microbes. A number of elements fall under this category, but the major elements are carbon, nitrogen and phosphorus. Carbon is readily available from many sources. The major source is CO2. This is available in abundance in the environment. Carbon dioxide is the main product of decaying organic matter, respiration of living beings and of industries having combustion processes.
