Bus companies' pollution-reduction plans riding on use of clean energy vehicles

Operators are introducing electric and hybrid models to cut emissions, as Zhu Lixin reports from Bengbu, Anhui and Qingdao, Shandong.

Many of China's larger cities are home to millions of residents and see thousands of buses in operation every day, resulting in pollution from exhaust emissions.

In response, a large number of cities are planning to improve air quality by replacing traditional diesel-or gasoline-powered fleets with clean energy electric and hybrid petroleum-electric or gas-electric vehicles, according to national traffic and transportation authorities.