Blood Types. Distinct molecules called agglutinogens (a type of antigen) are attached to the surface of red blood cells. There are two different types of agglutinogens, type A and type B.
Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. In common dialogue, the term fossil fuel also includes hydrocarbon-containing natural resources that are not derived from animal or plant sources.
Fossil fuels are a non-renewable source of energy. Formed from decomposed animals and plants that existed up to 300 million years ago, fossil fuels are located in the deposits beneath the earth.he use of fossil fuels (coal, oil and natural gas) is a problem because the burning of these fuels in industry, transport and the generation of electricity releases carbon dioxide (CO2). This is causing global warming and climate change.