美国空气最清新的城市

Honolulu
Population: 907,574
火奴鲁鲁
人口：90 7574

Honolulu is well-known as a popular vacation destination. But it can be a vacation for the lungs too, as it has some of the nation’s lowest levels of both ozone and particulates.
火奴鲁鲁以流行的度假胜地著称。但是它也是肺病患者的一个度假胜地，因为它是国家臭氧和微粒物质含量最低的城市之一。

Due to Honolulu’s isolation in the Pacific Ocean, Dr. Kaufman suggests that it generally remains safe from the long-range transport of pollution. Particles that result from burning coal, for example, can travel great distances, but few are likely to reach Honolulu, some 2,000 miles off the mainland.
由于火奴鲁鲁远离太平洋，Kaufman教授建议，总体上，它不受需要远程传送的污染物的影响。例如，由燃煤引起的微粒物质可以传播到远距离，但是极少会传到火奴鲁鲁，它离大陆约2000英里。

Large amounts of rain, adds Dr. Samet, also help.
Samet博士还称，大量降水也有帮助。