Six secondary school teams defeated 26 other teams to represent the SAR at the Apec Youth Science Festival in Singapore. They were winners of the Hong Kong Science Project Competition. The competition, in its second year, was jointly organised by the Innovation and Technology Commission (formerly the Industry Department) and the Hong Kong Federation of Youth groups. The winning projects of the six teams were displayed at the large-scale science and technology exhibition in Singapore. The 27 students also had a chance to exchange views with students from other Apec economies and visit research and de velopment institutions and universities in Singapore. Most of the winning projects were related to environmental protection. Two teams from Cheung Sha Wan Catholic Secondary School won the championship and second runner-up titles with their projects 'Thermal-electric Convertor House' and 'Natural Insecticides', respectively. Sixth former Cheung Pak-ki, 17, said they used the concept of thermoelectrical converters to build an environmentally- friendly house, in which the tem perature inside could remain stable regardless of the temperature outside. Tony Leung Tik-ka, 17, was involved in a project on whether plant sap could be used to produce environmentally-friendly and natural insecticides. Tik-ka, who is an environmentalist, had always wanted to apply his knowledge of biology and chemistry to daily life. 'At present, we might not be powerful enough to affect others, but I hope to further my studies and earn a PhD. Then I will be authoritative enough to tell people about my research and findings,' the sixth former said. The first runner-up was a trio from South Tuen Mun Government Secondary School. They conducted a study on using fish bile as detergent and found out that it was a natural and effective cleansing agent. Team member Eric Chu Lai- ming, 16, said one evening when he was looking through rubbish bins outside a market for fish bile, he was questioned by the police. The Diocesan Girls' School team, which won a merit certificate, studied the use of natural substances such as milk, beer, eggs and lemon as shampoo. The team said the substances were less harmful to our hair as well as the environment. Lindsay Ip Lin-sie and Vienn Lau Wai-yan, both 17, said their project was inspired by the needs of daily life. The other two merit projects were the Highlighter Corrector invented by HKSYCIA Wong Tai Shan Memorial College and the Intelligent Lighting Control System by St Joan of Arc Secondary School.