Microorganisms at work in a sewage farm
Microorganisms are helpful in the disposal of human waste. Our waste material in the form of sewage is treated at a sewage farm. The clean and filtered water is finally sprayed over rocks and any microscopic bits of sewage still remaining are eaten by a variety of microorganisms. This process is shown in a sequence of magnified microorganisms. The clean water is then fit to be released into a river.
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