While walking on the footpath, sometimes some autos pass on road which exhaust a lot of smoke and gases causing pollution and we feel suffocated. Meenu discussed the problem with her teacher as to why these vehicles caused pollution. The teacher explained to her that exhaust pipes of some vehicles are not fitted with good quality catalytic convertors or people don't get the service of their vehicle done at regular times.
New, answer the following questions :
(i) What values are expressed in the above paragraph ?
(ii) How catalytic convertors fitted in the exhaust pipe help in reducing pollution ?

Explanation

(i) We should not use vehicle which causes pollution in the atmosphere.
(ii) Exhaust pipes are fitted with such catalytic convertors which speed up the reduction of pollutants of oxides of nitrogen produced due to combustion of petroleum products to free `N_(2)`, i.e., they accelerate purifying reactions.