On the other hand, natural resources can be harmful for both people and the environment. These disadvantages such as, oil and gas extraction is the process which causes pollution and destroys the marine life. Also, it makes water polluted with chemicals and harmful gases. It is reported that Mr. Acosta said that he would rather wish the oil organizations did not decimate common wealth. His thought was to leave oil underneath consequently for remuneration for the organizations (Dummette,2011,p.84). To this extent, some countries were careful not to destroy their nature despite of the wealthy petrol or gas. Using these resources also causes global warming which increases the temperature on earth. So, these resources are sometimes harmful more than useful. In addition, natural resources can make many problems in many countries. For example, the forests which are available in many countries largely prevent these countries from expanding and make many cities for people. In Africa and the south of America, these forests are considered a big obstacle for development and for building. Moreover, there are many fire break-out from time to time. This leads to pollution making. According to writer, the country confronts more than $150 billion weight throughout the following two decades to repair (Natural resources energy and the environment challenges for the 21st century,n.d,p.50).