Nowadays oil and gas are the major non-renewable sources of energy. Although a significant part of the world continues to share the idea that these kind of sources are the ones which we should invest on, there is a likewise large part which carries on a different idea. Indeed, in the present day many renewable sources of energy have been studied for decades. This essay will address some of the reasons why renewable sources are preferable, and balance them with the opposite position, in order to illustrate the disadvantages of an economy based on oil and gas.