The economy is a science that, basically, deals with the production of goods and services, and its appropriation. The size of the economy, simplified form, numbers is it of bags of rice and automobiles produced of generated kilowatts, minutes of telephonic conversion carried through and the too much goods and services. Therefore it deals with physical largenesses. To each one of these economic largenesses if she attributes one definitive amount of currency. This corresponding value in money if became necessary so that the people could effect exchanges of its time of work with a infinity of goods and services, what it would be impossible without this common denominator. (Source: Bill Phelan). The ambient management needs an ambient economy, whose main largeness is the natural resources. The elements of the nature are changedded into natural resources, depending on the form with that the man if relates economically with the environment. The existing substance and the energy in the environment start to be resource when it has utility for the men.
The natural resources are classified in you renewed and you did not renew. You renewed them if they reproduce in the time, either for the nature either for the human work. For you did not renew, a time consumed, will be impossible, economically, to come back to the previous situation. Amongst fuels, the alcohol is renewable and the oil is non-renewable. To attribute to values the natural good has been a challenge for the economists. Some principles and models had been developed and are being tested. Between them we have: ) The polluting agent-payer is a principle that taxes the polluting agents, proportionally to the pollution that to generate, to stimulate to me reduced them it there. b) The model disposal to pay and disposal to receive. The first one if bases fixes on it of how many it has been made use to pay not to lose a natural resources and as which the indemnity that if wants to receive for the loss of the resource.