With the heavy dust floating, the opening aggregate plants of Yongding River still brought air pollution to Beijing. For reducing the dust pollution there, Beijing has brought the treatment of aggregate extracting points and plants there into the measures of the municipal government starting from April last year. Up to now, the city has put down 214 aggregate extracting points and shut down 121 plants of such kind. Before the end of 2003, the existing aggregate plants will be gradually shut down and restore the surrounding ecological environment...