The earliest type of petroleum formed within the earth is chiefly a. Gaseous, with much methane. Very thick - almost solid. Very thin - higly fluid. Carbonate e. Silicate. 10.The type of coal with the most carbon content is a. Lignite.
Much water is required for processing.
With current methods, large quantities of rock must be mined. Large quantities of waste rock is produced from processing. If one were practicing the dilute and disperse method of disposing of a toxic liquid, one might use a. A sanitary landfill. A deep disposal well.