This means working to restore our ecosystems to their previous state so that they can be reused. Another aspect included in sustainable development is the satisfaction of needs for food, energy, water and basic sanitation; if these are achieved, the stress exerted on natural environments is eliminated (Harris 2006). In addition to these, the fusion of environment and economy in decision-making represents another way to ensure that a sustainable lifestyle is maintained through the development of our societies (Elliot 2006). In order for sustainable development to be implemented effectively, Harris (2006) proposes that there is an economic system that provides solutions to problems arising from development conflicts. This is due to the different opinions people have about the economy and what it should be