The trees and the green space of the rural tier in Prince George’s County is a fundamental pillar of human experience. Psychologists, sociologist and many residents agree on the view that the quality of urban life depends largely on the amount and quality of nearby green spaces. Urban green space not only improves ecological and psychological environment of urban population but also uplift economic conditions of the community. Thus Central Park in New York City, which no doubt has more developmental value than say Crain Corner in Upper Marlboro is off limits for commercial, industrial or residential development.
Green is the color most restful for our eyes, presumably because we evolved in a predominantly green environment. The Prince George’s County general plan recognizes this basic precept. Green spaces, significantly, bring a certain harmony to the urban environment and therefore, play a vital social role in ceasing urban tensions. In presence of trees, city dwellers take part in the rhythm of day and night so that their minds come to rest and find peace (Bernatzky 1978). The rural tier along with the park system serves several important functions like maintenance and sustenance of natural process such as water, gaseous nutrient cycles, support of flora and fauna, and maintenance of psychological health through beautification and enhancement of the appearance of a particular area to paraphrase (Wenger 1984). Recently planners and residents have come to understand the critical and crucial ecosystem service that green areas provide. From carbon storage and storm effect dampening, to habitat and refugium functions, to agriculture and yes to cultural informing services, the rural tier has a value beyond pavement, building, purchases and employment (all of these are important, we needs stores and the jobs they produce).
Of course a vibrant Prince George’s County needs businesses and healthy businesses need customers and employees who want to live in the area. We need both quality businesses and quality of life patterning in harmony, not one at the expense of the other. That is why there is a general plan which provides for both development and urban green spaces which managed and, to the extent under the plan allowed, exclusively on the basis of their aesthetic and spiritual values than on utilitarian benefits.
The enormous rate of growth of Prince George’s County along with the growth of urban development, has led to sometimes drastic exploitation of the nature resulting to an unhealthy and unwealthy ecology. Cities are experiencing the problems like deterioration of air quality, higher air temperature, increased noise levels, greater psychological stress and decreased sense of community. Increasingly society recognizes the need for urban green spaces. “With lack of green space, the exponential population increase in the twentieth century will make physical, social, psychological and environmental hazards in the third world countries.” 
 Miyan Rukunuddin Ahmed, Rakibul Hassan People's Perception toward Value of Urban Greenspace in Environmental Development; http://www.fao.org/DOCREP/ARTICLE/WFC/XII/0347-B5.HTM
An old Cherokee is teaching his grandson about life. "A fight is going on inside me," he said to the boy.
"It is a terrible fight and it is between two wolves. One is evil—he is anger, envy, sorrow, regret, greed, arrogance, self-pity, guilt, resentment, inferiority, lies, false pride, superiority, and ego." He continued, "The other is good—he is joy, peace, love, hope, serenity, humility, kindness, benevolence, empathy, generosity, truth, compassion, and faith. The same fight is going on inside you—and inside every other person, too."
The grandson thought about it for a minute and then asked his grandfather, "Which wolf will win?"
The old Cherokee simply replied, "The one you feed."
First People - The Legends. Cherokee Legend of Two Wolves. November 16, 2004. [accessed April 7, 2012].