China has reportedly built the biggest air purification tower in the world, standing at 100 metres (328 feet).

据报道，中国建造了世界上最大的空气净化站，高达100米。

This is particularly good news as China is the world's deadliest nation for outdoor air pollution, according to the World Health Organisation (WHO).

世界卫生组织说，这对中国来说尤其合适，中国是最需要治理空气污染的国家。

Another report by WHO warns that air pollution is the biggest environmental risk to health, responsible for one in nine deaths annually worldwide and killing around 3 million each year. This is only getting worse.

世界卫生组织发出警告，空气污染对健康的危害最大，全球每年死亡率达九分之一，因为空气污染死亡的人数年均三百万。而且空气污染日益严重。

In the northern Chinese city of Xian, there is some hope. Here, the experimental tower is having a positive effect on air quality in the area, reports the South China Morning Post.

但是在西安，这种中国北方城市，希望犹存。《南华早报》说实验站确实改善了空气质量。

Cao Junji, who leads the research on the tower, told the paper:The tower has no peer in terms of size...The results are quite encouraging.

实验站的负责人曹军骥告诉《南华早报》：“我们的实验站是目前世界上规模最大的……带来的效果令人欣喜。”

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