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Environmental Issues

Short Answer Type

51. Write a note on working of electrostatic precipitator.

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52. How does a scrubber function ?

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53. Differentiate primary air pollutants and secondary air pollutants.

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54. What is photochemical smog ? How does smog affect biological world ?

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55. What is acid rain ? What are its effects on plants ?

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Long Answer Type

56. What measures do you suggest to control pollution from automobile exhaust ?

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Short Answer Type

57. Briefly explain noise pollution.

Noise is undesired high level of sound. Noise pollution is harmful or annoying levels of noise. Sound above 60-70 decibels comes in the category of noise. The main sources of noise pollution are loudspeakers, pressure horns, supersonic jets etc. Noise causes psychological and physiological disorders in humans. Noise pollution causes mental tensions, physical tiredness, loss in learning capacity or complete deafness.

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