Petroleum is hidden underground in pockets of the Earth called pores. It’s scarce because of increased demand. Petroleum’s used for a lot of things such as transportation fuels, which is very important. Petroleum, by definition, is a liquid mixture of hydrocarbons that is present in suitable rock strata and can be extracted and refined to produce fuels. I believe society as a whole should make choices about how to use petroleum because all of society needs it.