<Ul> <Li> Biotic--Biotic resources are obtained from the biosphere (living and organic material), such as forests and animals, and the materials that can be obtained from them . Fossil fuels such as coal and petroleum are also included in this category because they are formed from decayed organic matter . </Li> <Li> Abiotic--Abiotic resources are those that come from non-living, non-organic material . Examples of abiotic resources include land, fresh water, air, rare earth metals and heavy metals including ores such as gold, iron, copper, silver, etc . </Li> </Ul> <Li> Biotic--Biotic resources are obtained from the biosphere (living and organic material), such as forests and animals, and the materials that can be obtained from them . Fossil fuels such as coal and petroleum are also included in this category because they are formed from decayed organic matter . </Li> <Li> Abiotic--Abiotic resources are those that come from non-living, non-organic material . Examples of abiotic resources include land, fresh water, air, rare earth metals and heavy metals including ores such as gold, iron, copper, silver, etc . </Li> <P> Considering their stage of development, natural resources may be referred to in the following ways: </P>

Classification of natural resources on the basis of availability