Nearly 200 trees were planted in Sai Kung Country Park as part of Hong Kong University of Science and Technology's Environmental Protection Day. The day also included displays of sophisticated apparatus to measure air pollution, laboratory experiments and exhibitions about sea-life, butterflies and monkeys. The day was organised by Biology students and staff, who also grew potted examples of Hong Kong plants to show visitors. Second-years displayed their findings about how pollution was affecting white dolphins and coral reefs in the territory's waters. Their third-year counterparts demonstrated biotechnology in the department's laboratory. Seminars and talks on the environment were hosted by lecturers and professors. More than 200 students and lecturers helped plant the trees in Sai Kung. Biology lecturer Dr Albert Yu Cheung-hoi said: 'I am very pleased to see these students taking the initiative in promoting environmental protection.' First-year student Willis Ko Lung-sang said: 'We are happy and satisfied. We can put what we learn into practice and at least help teach the next generation.' Schools were invited to the exhibition at the university.