Preserving nature is important because the biodiversity of the planet, including the human race, is dependent upon properly functioning natural processes. Without a healthy natural environment, most life would cease to exist, according to Mother Nature Network.
The natural world is governed by the laws of biology, chemistry and physics and has been since the birth of the plant billions of years ago. A healthy environment provides nutrients that flow up the food chain, from plants to animals, to provide energy. The nutrients are then recycled to repeat the process.
By preserving nature, the planet and all its inhabitants are guaranteed a constant supply of clean water and fresh air, according to the Nature Conservancy. Trees produce the oxygen that humans and other animals need to breathe and absorb the carbon dioxide that they exhale. Trees absorb airborne pollutants such as carbon monoxide, sulfur dioxide and nitrogen dioxide. They also remove toxins from the soil and help to reduce noise pollution.
Clean water is necessary for all living things. All animals and plants are made mostly of water and require a constant supply of clean water to remain healthy. Water falls to Earth as rain to water plants, provide drinking water for animals, and maintain rivers, lakes and oceans. It evaporates and forms the clouds that then release rain to repeat the water cycle.
Overbuilt environments disrupt and overwhelm nature's processes by removing trees and polluting the water and air, which leads to decreased biodiversity and overall natural health, according to the Union of Concerned Scientists.