The students first examined the buildings in Kwai Lok Street to see if they were for commercial, industrial, recreational or residential purposes.

''We found that pollution had reached an alarming level, and there were a lot of fire hazards. Goods were stocked everywhere in the buildings,'' she said.

''Illegal parking was also a problem as trucks were constantly loading and unloading goods.'' To reduce pollution, the students suggested more effective treatment of industrial wastes such as recycling and the installation of pollutant-absorbing devices.

''We also suggested that the Government improve the existing parking facilities for container trucks,'' Yee-ka said.

As for the traffic problem, the students set up a checkpoint in Kwai Lok Street to monitor the number of cars during rush hour.

''We looked at all kinds of vehicles and also pedestrians,'' said Patsy Lau Pui-sze, another sixth former.

''We found that traffic was heavy because a lot of container trucks and lorries were on the road. Also, a lot of them were illegally parked, obstructing the flow of traffic.'' Pui-sze said they suggested that the Government create more parking facilities and build more footbridges, subways and zebra-crossings.

Other interesting projects were also on exhibit.

A group of Economics students set up some displays on ''Hong Kong Stadium and Property Rights''.

The stall set up by the Computer Club attracted many visitors as exciting computer games were lined up for them. There were also demonstrations of common application software.

Counters set up by the Guidance Committee and Junior Police Call featured fun and challenging games in which winners were awarded souvenirs like bookmarks and pens.