Ranchi Traffic Police — no action is being taken against auto drivers for using polluted vehicle

Sir,
With profound respect i beg to state that just i shifted to ranchi but i m facing lot of problems. Firstly i would like to tell about diesel auto like a bus and carrying full of 20, passengers in there auto. More than 20 years of diesel auto are running at ranchi road. Who produced large amount of smoke resulting that pollution level is more than 150. Ranchi is also counting a polluted city. My request is that plese do out of these type of diesel auto from ranchi. The bell is ringing if not cotrol it will highly dangerous for our future like delhi and it is happening & managing with local trafic police. So please please control it also policia system is also responsible sir. Large diesel type auto should be ban in inner road in ranchi city and valid till 10 year auto life. It it changes it will highly grateful to you sir... Thanks