natural area(An area in which natural processes predominate, fluctuations in numbers of organisms are allowed free play and human intervention is minimal)
natural areas protection(Active management of nature areas in order to ensure that wildlife is protected and the quality of its environment is maintained)
natural disaster(Violent, sudden and destructive change in the environment without cause from human activity, due to phenomena such as floods, earthquakes, fire and hurricanes)
natural environment(The complex of atmospheric, geological and biological characteristics found in an area in the absence of artifacts or influences of a well developed technological, human culture)
