<P> The Age of Oil , also known as the Oil Age or the Petroleum Age , refers to the era in human history characterised by an increased use of petroleum in products and as fuel . Though unrefined petroleum has been used for various purposes since ancient times , it was during the 19th century that refinement techniques were developed and gasoline engines were created . </P>
<P> The Age of Oil , also known as the Oil Age or the Petroleum Age , refers to the era in human history characterised by an increased use of petroleum in products and as fuel . Though unrefined petroleum has been used for various purposes since ancient times , it was during the 19th century that refinement techniques were developed and gasoline engines were created . </P>
what are the characteristics of the age of oil
what are the characteristics of the age of oil
increased use of petroleum in products and as fuel
increased use of petroleum in products and as fuel