专家们警告说，世界上一半的人口将在20年内患上花粉症。

　　Some 15 million Britons are currently afflicted, but with more people moving to cities, the number of sufferers will double to 32million by 2030.

　　英国有约1500万人目前已染上这种病症，而且随着越来越多的人口向城市迁移，这一数字将在2030年前成倍增长，达到3200万。

　　The rise will be fuelled by air pollution in urban areas which exacerbates the symptoms of sneezing, runny nose and eyes triggered by pollen, says the Hay Fever Health Report.

　　这一上升趋势主要是城市空气污染所造成的，污染也会加重像打喷嚏、流鼻涕以及花粉引起的眼睛不适等类似的病发症。

　　The rise could affect productivity because one in five sufferers takes time off work when their symptoms are at their worst.

　　同时，花粉症患者数量的增加还会影响工作效率，因为每五个患者中，就有一位会在他们症状严重时请假休息。

　　The report forecasts the biggest rises in London and Birmingham, with 45 per cent of the cities' population affected, up from the current 25 per cent.

　　报告中预测，伦敦和伯明翰这两座城市患花粉症的人数，将会从之前的25%上升到45%的人口。

　　Those in coastal areas and Scotland will be better off, with 39 per cent expected to suffer.

　　那些沿海地区以及苏格兰地区的状况可能会好一些，我们预测患病者人数将会是总人口的39%。