Diesel vs gasoline

Burning gasoline produces carbon dioxide, a major greenhouse gas that is linked to global climate change.
Gasoline is a highly flammable and toxic liquid. The vapors given off when it evaporates and the substances produced when it is burned (carbon monoxide, nitrogen oxides, particulate matter, and unburned hydrocarbons) contribute to air pollution.

Diesel fuel is the main fuel used for transporting goods across the United States. Diesel fuel is heavier and oilier than gasoline and when it was first used in cars during the oil crisis of the 1970s, people found their cars covered in soot. Indeed, diesel engines can emit a fair amount of nitrogen compounds and particulate matter as they burn diesel fuel. These facts combined to give diesel fuel a bad environmental name, even though it in fact emits lower amounts of carbon monoxide, hydrocarbons and carbon dioxide than does gasoline.