1. air: air includes outdoor air and indoor air. No matter who is polluted, it will have adverse effects on health. It should be noted that smoking will pollute indoor air. It is the main risk factor of cancer, cardiovascular disease, chronic bronchitis, emphysema and gastric ulcer.
2. Water: Water is an indispensable substance in people's production and life, and the quality of water environment will directly affect people's health. For example, after water is polluted by chemicals, it will cause poisoning if it enters the human body through drinking water or food chain. Acute poisoning and chronic poisoning caused by pollutants are the main aspects of the harm of water pollution to human health.
Other factors
1, Climate: Climate change will also affect health. For example, continuous high temperature environment can lead to heatstroke, kidney and circulatory diseases and the risk of stroke, while extremely cold environment may increase respiratory diseases and frostbite.
2. Topography: Different topography and geology will lead to different contents of various chemical elements, which will have different effects on human health. If iodine deficiency in the environment will lead to endemic goiter; Excessive fluoride in the environment will lead to skeletal fluorosis; Endemic arsenic poisoning and Keshan disease are related to the content of local geological materials.
Refer to the above? Baidu Encyclopedia-Natural environment (environment formed by natural things such as soil, water, region and climate)