He Kebin, Dean of Tsinghua School of Environment: Sprinkling water may aggravate smog

He Kebin said that in 2013, 74 cities across the country announced PM2.

He believes that compared to the one-to-one treatment such as acid rain and sulfur dioxide, the phenomenon of haze is a relatively more complicated process, which is related to the particulate matter emitted at one time and has the problem of gaseous transformation

Photochemical reaction it refers to the change in phase, is referred to as "the case where the light, the haze generated quickly, but the haze already very severe cases, may be quite different to the water"

From the regional perspective of smog management, He believes that policymakers need to study the changes in smog composition in various cities

One of the ultimate questions in the treatment of smog is, how long will it take to cure the smog? He Kebin himself did not directly answer this question

In his view, the air quality assessment must be adhered to for a long time now.

After so many years of environmental protection, why does it seem that the more dry the pollution, the more severe the pollution? As an environmentalist who has worked for decades, He Kebin also talked about the history of environmental protection

From 1970 to 1990 in history, China’s main focus was on the treatment of large particles like TSP.

　　In the third stage, when industrialization is still progressing at a high speed, urbanization is coming.

　　In 2007, the total emissions of sulphur dioxide have been reduced historically, and the acid rain pollution in the southwest has been broken

　　He Kebin believes that this is the fourth stage of the problem.

　　Last year, China proposed an action plan for the prevention and control of air pollution, which imposed requirements on the concentration indicators for various regions.