By The Oregonian/OregonLive.com
An international index is rating Portland and Seattle among the top five cities with the worst global air quality on Wednesday.
The IQAir index says Portland is fourth in the world for terrible air quality and pollution on Wednesday evening, and Seattle is second.
No. 1 in the world is Lahore, Pakistan, and No. 3 is Dubai, United Arab Emirates. Rounding out the top five is Chengdu, China.
Seattle briefly ranked No. 1 on Wednesday, according to The Seattle Times. IQAir is a Swiss air-quality technology company that also operates a real-time air-quality information platform.
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