Ecofriendly literature?

Certain things are categorized as ecofriendly and people are encouraged to use such products to protect the environment. Then why not label a particular set of works as ecofriendly literature which blends nature and the human life. Native American literature by all means can be labelled as ecofriendly. The reading of some of the well known works in Native American literature gives an impression that even ages before through the oral tradition of storytelling people have been made conscious of their vital role in protecting the environment. Their vital and seminal relationship with the nature is made to realize through the stories and at the present age through their literature. More aptly the contemporary Native American works are also often categorized as "nature or land based". All the four elements of nature forms a major part of their literature.
Marina Schauffler in her work Turning to the Earth identifies and labels a group of witers as "Ecological Writers". She considers them as "ecological writers" since these writers integrate a profound spiritual and philosophical sense about the earth into their practical lives. Native American literature is often subjected to ecocriticism, Writers are termed as "Ecological writers", then why not call the Native American literature as ecofriendly literature?.....