The Permanent Secretary for the Environment, Transport and Works (Environment), Mr K K Kwok, and members of the Advisory Council on the Environment (ACE) visited a sampling point of a monitoring station at the roof-top of Panyu Wangqingsha Secondary School to see the operation of the Pearl River Delta Region Air Monitoring Network. From left: Mr Kwok, ACE members Mr Tsang Kam-lam, Prof Poon Chi-sun and Dr Ng Cho-nam, and ACE chairman Prof Lam Kin-che.   Close