Fractionation is an important part in refining petroleum into gasoline or any other petroleum based product. Oil refineries separate petroleum based on their densities. There is both light oil and heavy oil processing units in a refinery.
In 2018, smoke from the cataclysmic Northern California firestorm known as the Camp Fire turned the Bay Area air toxic, shuttering multiple businesses and schools, and inhibiting outdoor activities for millions of people.
Marathon Petroleum is a leading, integrated, downstream energy company.They operate the nation's largest refining system, are one of the largest midstream operators in North America, and have a nationwide retail and marketing business.
Some forms of energy are harmful to our environment, where others are not as harmful. We harm our environment by adding pollutants into the air when we transfer energy from one form to another.