Why is the air in Changchun North Lake bad?

The reasons for the bad air in Changchun North Lake are as follows.

1. The air in Changchun North Lake is bad because the urban heating system is fully turned on in cold winter, and the heating system emits a lot of pollutants. Coupled with the weather, the discharged substances cannot spread, resulting in a particularly serious smog in Changchun this year.

2. Chemical pollution mainly comes from home decoration, children's toys and architectural coatings. Some pollution will increase with the increase of human activities, and it will stop when human activities stop, while some pollution will not be affected by human activities and is a source of continuous release. For example, building decoration materials are the source of continuous release, and the release speed will change with temperature. This emission source is harmful to people's health. After renovation, people will purify it before putting it into use.

3, biological pollution, mainly from indoor damp places, such as wet walls, moldy carpets, corners that are easy to breed bacteria and viruses. Indoor pollution concentration is related to the volume of space. The distribution of this pollution in buildings is uneven, depending on the location of pollution sources and air circulation. The larger the building volume, the greater the possibility of biological pollution, and the distribution of pollutant concentration is relatively complicated.

4. Radiation pollution: mainly from radioactive substances and light radiation generated by electrical appliances. If we only look at a single quantity, the pollution degree is very small. If radioactive sources are concentrated in the same room, the air quality index will drop over time, which will affect people's health.