All fossil fuels are literally "fossils", i.e., the remains of thick layers of either land vegetation or marine plankton that died millions of years ago and were then buried and folded into the earth, heated and compressed to be transformed into either a type of sedimentary rock (coal) or deposits of liquid hydrocarbons (oil and gas). See Novaczek, Irene. „Canada's Fossil Fuel Dependency”. Elements. Arhivat din original la . Accesat în .
US EPA.2000. Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-1998, Rep. EPA 236-R-00-01. US EPA, Washington, DC, http://www.epa.gov/globalwarming
All fossil fuels are literally "fossils", i.e., the remains of thick layers of either land vegetation or marine plankton that died millions of years ago and were then buried and folded into the earth, heated and compressed to be transformed into either a type of sedimentary rock (coal) or deposits of liquid hydrocarbons (oil and gas). See Novaczek, Irene. „Canada's Fossil Fuel Dependency”. Elements. Arhivat din original la . Accesat în .
