The city with the worst environmental sanitation in China.

The top 10 cities with relatively poor air quality are Baoding, Xingtai, Shijiazhuang, Tangshan, Handan, Hengshui, Jinan, Langfang, Zhengzhou and Tianjin.

Harm of poor air quality to people

Inhalable particles will accumulate in the respiratory system after being inhaled by people, causing many diseases. Contact with coarse particles will harm the respiratory system and induce asthma. Fine particles may lead to heart disease, lung disease, respiratory diseases and reduce lung function. Therefore, for sensitive people such as the elderly, children and people with heart and lung diseases, the risk is greater. In addition, the particulate matter in the ambient air is the main reason for reducing visibility and destroying the surface of buildings. Particles will also be deposited on the leaves of green plants, interfering with the process of plants absorbing sunlight and carbon dioxide and releasing oxygen and water, thus affecting the health and growth of plants.