As the world enters the second decade of the 21st century and beyond, modern agriculture using tractors, pesticides, and artificial fertilisers is becoming less sustainable as prices for petroleum gasoline start to skyrocket in addition to rising electricity prices. The population of the world will reach 9.2 billion people by the year 2050; making modern agriculture almost impossible to maintain unless massive technological advances are made. The current levels of technology associated with agriculture force people to be reliant on butchers with a skilled level of education in addition to greengrocers and massive levels of chemicals to deliver the product from more than away so that the product is no longer considered to be local.