English composition: smog describes the causes, harm and solutions of smog in English.

Haze weather has become a health killer, and exposure to smog is a serious hazard.

Hazy weather leads to low visibility in most parts of the city. When the relative humidity is high in the morning or at night, fog forms; During the day, the temperature rises, the humidity drops, and it gradually turns into smog. This phenomenon has both meteorological reasons and pollution discharge reasons. Since 20 131October 9, the central and eastern regions of China have been caught in severe smog pollution days. The Central Meteorological Observatory upgraded the fog blue warning to a yellow warning. 13, Beijing even issued the first warning in Beijing's meteorological history. 1 mid-month, the air pollution index in Beijing is close to 1000. From northeast to northwest, from north to middle, Huanghuai and Jiangnan areas are heavily polluted.