How is it used? What is environmental impact?
Petroleum is Non-Renewable Resource. It a oil and Natural Gas reserve are found in many parts of the world. It pollutes the air.
Will we run out? How much does petroleum cost?
We don't have to worry about running out of oil or Natural Gas any time soon. It sometime its high and something low?
How does it produce energy?
crude oil made into gasoline,diesel fuel.