What is the environment? The environment is a general term. "Huan" means around, and "Jing" means territory or land. Today, there are different understandings and various definitions of the concept of the environment. However, a more consistent view is that the environment includes both the natural environment and the social environment. People live on the surface of the Earth, and every moment they need to breathe fresh air, drink clean water, and consume a certain amount of food such as grains, vegetables, and meats. These foods are obtained through human production labor, and most human food comes from animals and plants, which are also living beings that require air, sunlight, water, and nutrients. Therefore, the so-called environment refers to people's daily living environment and the external environment in which they engage in production. It consists of a natural environment made up of air, water, soil, and living organisms.