Question

(b) Why should we switch off the engines of vehicles while waiting at traffic light?​

Answer 1

Answer:

Explanation:

If we keep our vehicle's engine on it will keep on utilizing petrol and release carbon dioxide thus polluting the nature more. Further petrol is only in limited quantities so they must be conserved as they take millions o years to form.

THUS WE SHOULD OFF OUR ENGINES WHILE WAITING AT THE THE TRAFIC LOGHT

Answer 2

Answer:

1) It is a waste of fuel.

2) It causes pollution

3) In some rare cases it may also cause noise pollution, because, continuously hearing the idling sound(loud idling- around 60 dB) can cause headache to you and people around you.