(b) Assist developing countries and countries with economies in transition to strengthen their national legislation and institutions to prevent, reduce and control at source pollution, including transboundary air and water pollution;
(b) 协助发展中国家和经济转型国家加强其国内立法和机构，以便在来源上预防、减少、和控制污染，包括越境空气污染和水污染；