(i) Point-source pollution, in which contaminants are discharged from a discrete location. The principal contaminants of water include toxic chemicals, nutrients, biodegradable organics, and bacterial & viral pathogens. (Oval Cysts not seen) 6. The common equipments / process used for control of toxic / flue gases are the (a) process of desulphurisation; (b) process of denitrification; (c) Gas conditioning etc. Classification of Environmental Pollution – Pollution can be broadly classified according to the components of environment that are polluted. This is caused by presence of oxides of nitrogen and sulfur in the air. (d) The green house gases, such as carbon dioxide (CO2) and methane (CH4) trap the heat radiated from earth.
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