ENVIRONMENT

In general, natural environment means the surroundings where all livings and non living things live on the earth. It is the environment that interacts all living species on the earth. the natural environment can be defined in many ways, universal natural resources and physical activities such as air, water, and climate, and energy, electric charge as well, not originating from the human activity.
the naural environment is now a built environment, which comprises the areas and components strongly  influenced by humans.A geographical  area is regarded as a natural environment, when human impact is kept on it under a limited level.

Environment needs to be kept clean everytime in order to remain healthy for human beings. Environment includes all the living and non living things. environment includes all the natural components: air, water, land, trees, etc. They all are the natural things found in the environment.