1 the surroundings or conditions in which a person, animal, or plant lives or operates.
2 the natural world, as a whole or in a particular geographical area, especially as affected by human activity.

i thnk environment is derived from french word envirroner which means to encircle or to environment is defined as that which surrounds us(the air water land......whatever)
It's everything that make up surroundings and affect our ability to live on earth.

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