Answers

2015-06-11T13:58:29+05:30
We must stop the engine when we are in traffic jam, on crossing and waiting for any person to meet on the vehicle. We should not always use vehicles we can even walk or ride bicycle for smaller distance. It will not only save fuel but our health will also be good.
2 4 2
2015-06-11T13:58:48+05:30
Off the car's engine at traffic signals
use catalytic convereter 
drive at ≥ 40km/hr
0