20. Recognizes that the lack of adequate housing remains a pressing challenge in the fight to eradicate extreme poverty, particularly in the urban areas in developing countries, expresses its concern at the rapid growth in the number of slum dwellers in the urban areas of developing countries, particularly in Africa, stresses that unless urgent and effective measures and actions are taken at the national and international levels, the number of slum dwellers, who constitute one third of the world's urban population, will continue to increase, and emphasizes the need for increased efforts, with a view to significantly improving the lives of at least 100 million slum dwellers by 2020;
20. 认识到缺乏适当住房对消除极端贫穷的斗争继续是一项严峻挑战，尤其是在发展中国家的城市地区，关注发展中国家、尤其是非洲国家城市地区贫民窟居住者人数迅速增多，强调除非在国家和国际两级采取紧急有效措施和行动，否则占世界城市人口三分之一的贫民窟居住者人数将继续增多，并强调必须加紧努力，以期至迟在2020年大大改善至少一亿贫民窟居住者的生活；