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The words nature and natural are used for all the things that are normally not made by humans. Things like weather, organisms, landforms, celestial bodies and much more are part of nature. Scientists study the way the parts of nature work. Things that have been made by people are said to be man-made or called artifacts.
From one point of view, humans are a prime example of nature, and are the most widely studied natural inhabitants of the planet earth. Humans interact with each other in their natural environment on a constant basis. Every part of nature – everything from the air to the dirt on the ground – is interdependent. Medicine studies humans in health and sickness.
From another point of view, humans and nature can be said to be in conflict. Nature is often seen by humans as natural resources. People cut down trees to get wood to burn, to build houses, or to make a place to grow food. Fires, cars, and factories make a lot of smoke and harm many places. People who like to leave nature unharmed and those who feel they need to use more of nature often fight about what they should do. In the modern world, with many more people and many big cities, these problems are becoming more serious.
Nature, in the broadest sense, means the physical world as a whole. This is the meaning that physics, the study of nature (etymologically), takes.
A useful definition of natural is
- "Happening or operating in accordance with the ordinary course of nature". Oxford Shorter English Dictionary says the word in this sense is first found in 1477.