Bangladesh has the highest population density in the world. Half the population don't have any kind of toilet, so they have to go outside wherever they can. Spread around by livestock and people, faeces ends up contaminating homes and food. The resulting diarrhoeal diseases, according to Water Aid, kill 125,000 children under the age of 5, every year. In the International Year of Sanitation, Earth Report travels to Bangladesh to discover changing attitudes to hygiene.

孟加拉国人口密度堪称世界之最。一半以上的人口甚至没有像样的卫生间,所以他们不得不到外面去。望眼过去人和牲畜交汇在一起，最终家园和食物受到污染。由水源引发的肠道疾病每年使125000名五岁以下儿童致死。值此国际卫生年,地球报道节目探访孟加拉卫生的改观情况。