Do you agree that classes should be closed when air pollution is high? urgently needed 10

Disagree, it's better to be indoors when air pollution is high, and classes are right indoors! The first is unscientific, and the second is that it affects teaching!

Of course, you can suspend outdoor PE and exercise classes!

I agree that the heavy air pollution has seriously affected the health of students and teachers, and I agree with this view.

I don't agree, the course is very tense, just reduce outdoor activities, is it difficult to go to class without going to class, or even out of the door?

At present, it is inevitable that formaldehyde-containing materials will be used in domestic decoration. Because formaldehyde is a binder with good effect and low cost, there is still no alternative product with no pollution, good bonding effect and production cost in line with the consumption level. Woodworking boards and man-made fiberboards, which are commonly used in decorative materials, are bonded with formaldehyde, and the adhesion of paint and latex paint on the wall also comes from formaldehyde.

To avoid decoration pollution to the greatest extent, the public should pay attention to four links before and after decoration:

One. Before the decoration, agree with the home improvement company on the requirements for the indoor environment and air quality after the decoration, and sign a standardized contract. In this way, it is easy to claim maintenance, rework and compensation in the event of renovation problems.

Two. When designing the home, the air circulation channel is fully considered, and natural ventilation will greatly reduce indoor pollution.

Three. When buying home improvement materials, try to choose materials with clear factory names and environmental protection labels.

Four. After the renovation is completed, it is best to choose a more scientific treatment plan and find a qualified professional indoor pollution control company for treatment.

Since the release time of formaldehyde can reach up to 15 years, the treatment of formaldehyde pollution can be chemically synthesized first, that is, the residual formaldehyde that has not been neutralized with the urea-formaldehyde resin in the decorative material can be quickly penetrated and released by spraying chemicals; Photocatalysis is then used to establish an "isolated" zone. In addition, foreign countries also use fans and other equipment as the power of the air circulation system, or use activated carbon fabric adsorption and other methods to filter the indoor air. Hope.

Agree to suspend classes! It should be about the body!

If you don't agree, you won't pollute when you go home.

Outdoor activities can be avoided.

Air pollution? You're in a classroom, what are you afraid of?

Can you avoid air pollution by closing classes?

Schools with red alerts for heavy air pollution must be closed.

Air pollution school closures are a measure mandated in the laws and regulations of some countries and regions. Especially in some areas with high levels of air pollution and serious environmental problems, ** will decide whether to suspend classes based on local air quality index (AQI) conditions and other relevant factors.

According to the classification method of the "Ambient Air Quality Index (AQI) Technical Regulations (Trial)" (HJ633-2012), in accordance with the relevant provisions of the Ministry of Ecology and Environment on the national heavy pollution weather warning and grading standards, according to the air quality results, taking into account the degree and duration of air pollution, the heavy air pollution warning is divided into three levels, from light to severe, yellow warning, orange warning and red warning.

Similar practices vary by region in countries around the world, but the AQI threshold for school closures is usually above 150 in most countries or regions where school closures have been implemented. In Beijing, for example, schools need to be closed when the AQI exceeds 200 or the concentration reaches more than 250 micrograms. In New Delhi, India, school closures have become the norm when the AQI exceeds 300.

The purpose of the school closure measures is to safeguard students' physical health and avoid health problems such as respiratory diseases, lung cancer, stroke, etc., caused by excessive air pollution. In addition, during school closures, it is common to take other measures to combat air pollution, such as restricting car movements, reducing industrial emissions, and enhancing waste disposal, to alleviate local air quality issues.

Depending on the situation

Air pollution thresholds, school closures, enforcement standards, etc., may vary from region to region, so decisions need to be made based on local laws and regulations and government preparedness. In addition, although the school closure measures can alleviate the impact of air pollution on students' health, it will also have a certain impact on the education and teaching of the key education, and the pros and cons need to be weighed.