Generally animals have their own natural habitats, and they are living in the natural environment. However human beings are living in a specially formed environment which can obtain the goodness of nature as well. These are known as cultural environments. A cultural environment must be formed close to the nature, and then it will remain for a long time. Because of a cultural environment which follows the nature also protects by the nature too. Within a well formed healthy culture, there should be a proper way of resource utilization, which is not harmful for the natural environment. And also a well formed systematical sexual lifestyle which is related to proper reproduction must be their. Most of human civilizations which are formed by the human beings, who lived in early stages of the history, are based on water resources and the agriculture. However region to region in the world, cultural environments are also different.