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Guangming.com: Who bought an air purifier for the city?

People in Beijing who are disappointed every time they open the curtains these days can finally enjoy Biyuntian's surprise today. Ms. Liu, a parent of a primary school near the Madian Bridge in Xicheng District, said that when she picked up her child from school on the 23rd, she found that a window was open in the classroom. After returning home, some parents talked about this in the group, and everyone asked if they could raise funds to buy an air purifier in the classroom. To her surprise, less than 3 hours, 35 parents responded positively. After that, 44 parents in the class averaged 70 yuan each to buy an air purifier for the child's classroom.
The cold air came and the heavy haze dispersed. After a rain, a snow, and a gust of wind, the face of the city finally refreshed. This also reminiscent of the Minister of Environmental Protection's summary of the status of rural pollution in China: "Garbage is scraped by wind and sewage is evaporated." Urban smog management, whether it is an emergency plan or long-term treatment, it seems obvious at the moment Not as reliable as God.
No child can suffer any more. Faced with the haze, even adults do not have to, children have weak resistance, it seems that air purifiers are a good choice. Not only Beijing, but also many schools or parents in many cities came up with such an idea. For example, in the Baoding Teachers Affiliated School, there are two wall-mounted air-conditioning-like machines in each "breathing classroom", which are connected to the outside through gray plastic pipes, and there is a fist-sized monitor connected to the wall. The display shows the current temperature, humidity, carbon dioxide and dust particles. In Shanghai, for example, many parents started to buy air purifiers and sent them to classrooms. Those who acted quickly even bought them and sent them to schools. Many companies also joined the "Clean Campus Action". In the second half of 2013, some companies donated 103 air purifiers to 17 poor schools in 4 provinces including Sichuan, Shandong, Jiangxi, and Hebei. It is reported that this donation will continue until 2015.
However, society has good intentions, but sending purifiers to campus is not a long-term solution after all. One is, first, the practical bottleneck of "security in electricity use". Similar to the installation of air conditioners in classrooms, the power of an air purifier suitable for a classroom area is quite large. If all classrooms are used at the same time, the normal electrified teaching in the school may be stopped due to the overload of the power grid. In both cases, the purifier is not like air conditioner. The former is related to health rights and the latter is a matter of enjoyment. If the question of "fairness" cannot be handled well in the allocation of resources, whether it is sent by parents or sponsored by the enterprise, it may bring the sequelae of "not suffering from unemployed but suffering from unevenness." For example, air purifiers are not the "standard configuration" of educational hardware. Purchasing problems, use problems, maintenance problems, network cable problems, safety problems, etc. may all become problems that schools cannot carry. The three are just common sense. Even if the child is armed with teeth in the classroom, how can he not participate in outdoor activities? Not to mention whether the circulated air is healthy or not, even from the perspective of children's daily life, "classroom time" is probably only a fraction of the day. How can the air outside the classroom door be rejected?
Either a child or an adult, in the face of air pollution, no one is a vajra mouse. Air purifiers can be installed in the classroom, air purifiers can be bought at home, and even gas masks can be worn when going out-even if technology relies on the mouth and nose to reject all bad air, the days of confinement in mechanical air are really overflowing. Breath of happiness and freedom? As environmental experts say, although air purifiers can effectively absorb particulate matter, some air purifiers using photocatalyst technology also produce ozone pollution, which is not less harmful to the human body than the haze itself. If the filter element cannot be replaced and cleaned in time, it will cause secondary pollution.
Facing the smog, we have to think, who can buy an "air purifier" for the city? Red warnings or emergency plans are after-the-fact relief. Only by controlling air pollution from the source, and only by being vigilant about the haze from time to time, can the system or heavy punch truly become the guarantee of good weather.