
The petroleum is a mixing of gaseous, liquids and solids elements which has been used for people since all the history. At the beginning, people used it for build, for make medicines or for battle in the war.
Actually the petroleum has other uses:
This material had turned of in one of the most importants things in the actually world. For example, the petroleum is used for make fuel for cars, planes and other transports or for differents products like plastic, insecticides, paper, cement, ointment, some syntatic materials...

In my opinion we give a lot of importance to this material. It is true that it is very important for our life and our economic but I think that humans have to look for alternatives energies.