State True/False against each statement : (i) Burning waste material in the open is the most effective method of disposal. (ii) Aland-fill should always be near a source of water supply. (iii) Seepage to underground water from dumping ground contaminates water. (iv) Plastic and polythene bags can be made into good manure. (v) Biogas is an important source of energy.
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(i) false. since it creates carbon dioxid and other toxic gases.
(ii) false. it contaminates both the air and the water of the surrounding
(iii) true. as when water seep through the waste it carries all the toxic elements, mineral, bacteria, viruses, flammables etc to the aquifer under the ground.
(iv) false. plastic and polythene are synthetic and manure are organic waste which gives nutrients to soil and plant both.
(v) true. now a days biogas is an essential for making any forms of energy (for example heat energy).
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