Environment is a multi-disciplinary topics directly related to the nature, human being and their activities. Concerns have been growing widely about changing environment and its impact upon the lives of the earth. In fact, areas of most researchers and efforts of most scientists are being concentrated towards environment in one way or the other. Accordingly, priority of the Government of Nepal has also been focused towards environment, be that in the name of "the Climate Change" or "Conservation" or " the quality of life of the people".
