question_answer

     Ishita went to her grandmother's home in her holidays. In grandmother's home, she noticed that the marbles used in balcony and on approach road from the gate to car garage has become yellow. Her grandmother told the problem started after establishing of a petroleum refinery in their locality. Read the above passage and answer the following questions (a) What is the connection of refinery to yellow colourisation of marble? (b) State other harmful effects of air pollution. (c) What values you have learnt from the given passage?          

Answer:

                                         (a) Smoke released by the refinery contains oxides of nitrogen and sulphur These gases dissolve in rain water give rise to acid rain. This acid rain is responsible for yellow colourisation of marbles.  (b) Harmful effects of air pollution are It affects the respiratory system causing breathing difficulties and disease like asthma, bronchitis, etc. (ii) It is also responsible for smog formation in winters.                                   (c) From the given passage, I have learnt that industries play major role in air pollution. These should be far from human inhabited areas. I have learnt the value of care for environment from this passage.