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Sweeta Mohapatra
Query: 16 / Answer: 15

21st Sep 2019 .

Public all over India is very much concerned about the deteriorating air quality in large parts of North India. Alarmed by this situation the Resident’s Welfare Association of your locality organised an awareness programme entitled “Bury not burn”. They invited you, being a biology student to participate.
 
(a) How would you justify your arguments that promote burying and discourage burning? (Give two reasons)
 
(b) With the help of flow charts, one for each practice depict the chain of events that follow.
 
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Smrutirekha Pathak
Query: 9 / Answer: 10

22nd Sep 2019 .

(a) Following arguments can be put to promote burying over burning :
 
(i) Burning of wastes results in release of various gases like CO, CO2, oxides of nitrogen and sulphur, etc. These gases are very harmful to environment as they cause global warming, acid rain, etc. These gases, when inhaled may cause health hazards like nausea, headache, allergies, respiratory tract diseases, etc.
 
(ii) Burying of garbage and other organic wastes in soil produces humus and inorganic minerals through decomposition and hence promote recycling of nutrients
 
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