Write a short note on:(a) A pond food chain (b) Incineration (c)Cfcs
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(b) Incineration is a waste treatment technology. It consists of combustion of waste for recovering energy. It is form of thermal treatment when gets coupled with high temperature. During treatment, the waste materials gets converted into particles, gases and heat.
However it is a highly contagious method because incomplete treatment of waste may leads to production of harmful gases like Carbon monoxide, Dioxins and other harmful substances.
It has advantages in medical waste treatment and other areas also.
(c) A chlorofluorocarbon ( CFC ) is an organic compound that contains carbon , chlorine , and fluorine , produced as a volatile derivative of methane and ethane . A common subclass are the hydrochlorofluorocarbons (HCFCs), which contain hydrogen, as well. They are also commonly known by the DuPont trade name Freon . The most common representative is dichlorodifluoromethane (R-12 or Freon-12). Many CFCs have been widely used as refrigerants , propellants (in aerosol applications), and solvents. The manufacture of such compounds has been phased out by the Montreal Protocol because they contribute to ozone depletion .
Chloro fluorocarbons (CFCS) not only causes hole in ozone layer but also causes greenhouse effects and adversely affects human life and environment as UV rays can directly affect human body due to ozone hole. n thus it should b banned.
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