Air pollution creates all sorts of ill-health effects and environmental damage. Now researchers in China are suggesting it lessens the kind of light rainfall vital for farms and drinking water.

• 空气污染会产生各种健康问题和环境损害。中国的研究人员现在暗示说，空气污染会减少对补充农业用水和饮用水至关重要的小雨。