The concentric model was proposed by Burgess. This model defines different social people to live in an urban area. This is a very famous model related to metropolitan cities for development. Many of the social groups are based on their socioeconomic status that stands from central part distance to downtown.
This model is called the concentric model because it defined all social groups in the shapes of the ring from the center part to the outer part. It is also called the Burgess model. The human geography and urban geography involve it in the development of urban metropolitan cities.
The term eco-centrism is a concept that believes in a nature-centered set of principles and values. It justifies that there are no existential differences between between human and non-human beings.
Since eco-centrists believe in protecting and improving the quality of the nature and environment, they advocate that human activities are the biggest potential threat to nature. Therefore, they adopt means and ways of lifestyle that would cause the least harm to nature and environment.
Likewise, Gertrude expressing deeply felt environmental concerns and tailoring everything she does and purchases to these beliefs describes eco-centrism.
