PM2.5 refers to the atmosphere diameter less than or equal to 2.5 micron particles, if people inhaling these particles for a long time, a certain damage to respiratory system. In the city, in addition to industrial production, heavy industry manufacturing, automobile exhaust emissions is one of the main sources of PM2.5. (May 18) morning, xian xian city environmental protection bureau joint motor vehicle exhaust pollution in the supervision and inspection center, random testing of more than 1500 cars.

On test place is located in the main thoroughfare qujiang newly developed area, slope is relatively slow, traffic is relatively dense.

Is in this section of the road are motor vehicle exhaust remote sensing monitoring, then the two devices will be to test the instantaneous by vehicle exhaust gas content, and only 0.7 seconds after the test results will show the car in the back of the LED screen, the driver can see at this time have own vehicle exhaust.

In just half an hour, nearly 500 cars through monitoring. Reporter discovery, checked of PM2.5 were unqualified, private cars and minivans, pickup trucks emission of exhaust gas from time to time there are overweight.

Xi 'an motor vehicle exhaust pollution in the supervision and inspection center rats: this car is exceeds bid badly, national standards for the hydrocarbon standard is below 150, this is 872, he very nearly five times, now he get a driver's license in the registration, and then there was fined fifty dollars, then have a month of time limit, after passing the re-inspection, can be on the road.

Inspectors said, overweight are mainly concentrated in the diesel exhaust pollutants, because this kind of automobile exhaust emissions of carbon monoxide, nitrogen oxides are big. At the same time, there is a car tail gas exceeds bid phenomenon cannot be ignored.

Xi 'an motor vehicle exhaust pollution in the supervision and inspection center rats: is our operating lease vehicles is more, they mainly is the excess nitrogen oxides. One, two, 345, etc.

In the test results, taxi exhaust excessive proportion accounted for forty percent of the total overweight vehicles.

Xian city environmental protection bureau chief engineer liang, and several other major cities of the country's situation is similar, if released according to the national ambient air quality standard comparison, nearly half of the time would be pm2.5 offers or overweight, from this perspective, our xi 'an atmospheric environmental quality, including the pm2.5 pollution situation is still grim.

For 132 vehicles exhaust pollutants exceeds bid, testing departments have done detailed registration, require the owner to the governance of vehicle, within one month after the re-inspection qualified, to hit the road.