Answer:

Everything that surrounds us is referred to as the environment. It also includes living, non-living, natural, and human-made things. The natural environment includes trees, gardens, rivers, lakes, air, bushes, and many more. Everyone knows that ancient humans lived closer to the natural environment. Thus, it is believed that ancients are lived for more extended periods. At present, we are surrounded by an artificial environment. We have made an artificial environment for ourselves, including, buildings, vehicles emitting poisonous gases, dust, rooms, streets, etc.