Harbin lies in the north of China where winter temperatures can drop to -40℃, demanding a six-month heating season．Daily particulate levels of more than 40 times the World Health Organization recommended maximum level were reported in parts of Harbin．The smog remained till 23 October, when almost all monitoring stations in Heilongjiang, Jilin, and Liaoning Provinces

　　reported readings above 200μg/m³forPM2．5．PM2．5 is the amount of particulate matter less than 2．5 micrometers in diameter in the air, with the WHO recommending a maximum 24-hour mean （平均值） of 25 micrograms per cubic meter （μg/m³）．On the morning of 25 October, PM2．5 measurements in Harbin had fallen to an average of 123μg/m³．

　　All highways in the surrounding Heilongjiang Province were closed．In Harbin, all primary and middle schools were closed for three days and authorities stopped flights at the airports．Hospitals reported a 23 percent increase in admissions for breathing problems．However, this smog will have no influence on Harbin Ice Festival events later in December 2017．

　　Air pollution in Chinese cities is of increasing concern to China’s leadership．Particulates in the air can affect human health and also have influences on climate and rainfall．Pollution from the burning of coal has reduced life expectancy by 5．5 years in the north of China, as a result of heart and lung diseases．

【河北省武邑中学2016届高考英语一轮复习单元检测：45】相关文章：

★ 2016高三英语二轮复习需掌握的五个原则

★ 天津市武清区杨村第四中学2016届高考英语一轮复习语法专题四《简单句的五大基本句型》课件外研版

★ 河南省三门峡市2014高考英语一轮（暑假）基础训练（7）附答案

★ 河北省武邑中学2016届高考英语一轮复习单元检测：37

★ 【三维设计】2017届高考英语（江苏专用）二轮复习完形填空解题技法示范课件：3

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：名校模拟（含解析）

★ 河北省武邑中学2016届高考英语一轮复习单元检测：40

★ 河北省武邑中学2016届高考英语一轮复习单元检测：27

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修6 unit3《A healthy life》

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题17 体育运动话题指导（学生版）