what are classifications of petroleum 
unrefined petroleum classes include asphalt bitumen crude oil and natural gas the bottom linepetroleum is a fossil fuel that is used widely in the daily lives of global consumers in its refined state petroleum is used to create gasoline kerosene plastics and other byproducts petroleum is a finite material and non renewable energy source because of its potential to be harmful to the environment alternative energy sources are being explored and implemented such as solar and wind energy 