Jam will lead to more pollution: Experts

Despite success in slashing the number of heavy pollution days in the city this year, Beijing still faces an environmental debt from its mounting traffic congestion, air pollution specialists warned yesterday.

Zhu Tong, an environment professor at Peking University, said it was too early to reach positive conclusions about Beijing's air quality because the car population is about to hit four million this week.

"Beijing's air looks to be improved from the government numbers after the Olympics," said Zhu.