Effective techniques and methods are introduced to measure the pollution of solid pellets in hydraulic oil.

Due to the different influence of inhalable particle pollutant upon the transmissivity between visible channel and near infrared channel of NOAA satellite, a difference vegetation index I_(DV) is built.

In order to quantitatively assess the effects of construction activities on particulate matter pollution along roadways, some representative sections of roadway were selected to monitor the concentration of particulate matter and its distribution characteristics, and the load of dust and its size distribution.

By combining the successful experiences of controlling motor vehicle particulate emission at home and abroad with the special condition in Xi an, the potential strategies can synthetically control particulate pollution through motor vehicle management and technical methods aiming at all the motor vehicle paniculate-producing sources.