The dirtiest places in Hong Kong are the Shek O headland and Causeway Bay typhoon shelter, according to a two-week radio poll. RTHK Radio Three asked listeners to phone and fax in their nominations for the filthiest areas in the SAR. 'Most said Shek O headland is constantly stuffed with rubbish and the hygiene conditions are rather poor,' a station spokesman said. Lamma and Lantau Island beaches were rated third and fourth dirtiest, followed by Tsim Sha Tsui. The poll results will be sent to the Environmental Protection Department.