Up until the advent of GroGasoline, all of the gasoline available came from fossil deposits of patroleum.  In fact, the world petroleum is the breakdown of product of life from many millions of years ago.  The majority of the life forms were photosynthetic.  They used the energy from sunlight to take the carbon dioxide out of the air to make carbohydrates, DNA and hydrocarbons.  In special areas, these products of sunlight degraded and accumulated into vast deposits of liquid petroleum.  In other words, petroleum can be regarded as a vast store of ancient sunlight energy.  It is Nature's gift that cost nothing to make. 

    Liquid petroleum is pumped out of the ground and transported to refineries.  Refineries break the long-chain hydrocarbons into gasoline, aviation fuel, diesel, and other products, followed by separation of the fuels.  The majority of high quality petroleum yields gasoline.  Some companies take further steps to clean there products, and proprietary additives distinguish one brand from another.