哪里来的烟，这么呛人，像国内的雾霾一样

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怎么回事

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FROM EDMONTON JOURNAL:
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- _+ P+ A& s! T% h: h; FEdmonton suspended in twilight; fires continue to burn
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) E, U1 C+ H$ H% ], ^* N( |! P0 PEDMONTON - Edmonton remains in a smoky haze as of Thursday morning, with the city seemingly stuck in twilight.
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But, according to Alberta government data, the health advisory has been downgraded to a three, which is low health risk, from a high of seven (high risk) on Wednesday.
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The air quality is supposed to decrease over the course of the day to a five (moderate health risk) and then a seven by Friday.
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) Q/ E4 @1 `8 i. l+ U( {0 GThe smoke is blowing into the city from hundreds of fires burning in British Columbia, Northwest Territories and Alberta. Hundreds of thousands of hectares have been razed in the blaze.

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有心血管，呼吸系统疾病的人要尽量减少外出。

mont

森林大火