Give reasons why :
(a) Waste water should not be allowed to stagnate in puddles.
(b) Waste water from a factory should not be allowed to mix with drinking water.
(c) Rubber, plastic should not be burnt.
(d) The quantity and types of garbage generated have increased.
(a) Stagnant water is ground for breeding of mosquitoes, which in turn, causes the spread of many diseases. Puddles of waste water block the sewage and gutters, which makes the surroundings unclean and unhygienic. Therefore, waste water should not be allowed to stagnate in puddles.
(b) Waste water from the factory contains various harmful chemicals which on entering human body can cause severe diseases. Therefore, drinking water should not be allowed to mix with waste water from the factories.
(c) Rubber and plastics release harmful gases on burning which can cause respiratory problems. Therefore, rubber and plastics should not be burnt.
(d) The quantity and type of garbage has increased to several folds due to the continuously increasing population and their demands. Earlier, most of the garbage consisted of biodegradable material but due to advancement in technology, non-biodegradable material such as plastics, computer waste and aluminium wrappers are also generated on a large scale.