There are various criteria for classifying natural resources. These include the source of origin, stages of development, renewability, and
ownership.
Origin •
Biotic: Resources that originate from the
biosphere and have
life, such as
flora and
fauna,
fisheries,
livestock, etc.
Fossil fuels such as
coal and
petroleum are also included in this category because they are formed from decayed
organic matter. •
Abiotic: Resources that originate from non-living and
inorganic material. These include
land,
water,
air,
rare-earth elements, and heavy metals, including
ores, such as
gold,
iron,
copper,
silver, etc.
Stage of development •
Potential resources: Resources that are known to exist but have not been utilized yet. These may be used in the future. For example,
petroleum in sedimentary rocks that, until extracted and put to use, remains a
potential resource. •
Actual resources: Resources that have been surveyed, quantified, and qualified and are currently used in development. These are typically dependent on technology and the level of their feasibility,
wood processing for example. •
Reserves: The part of an actual resource that can be developed profitably in the future. •
Stocks: Resources that have been surveyed but cannot be used due to lack of technology,
hydrogen vehicles for example.
Renewability/exhaustibility •
Renewable resources: These resources can be replenished naturally. Some of these resources, like
solar energy, air, wind, water, etc., are continuously available, and their quantities are not noticeably affected by human consumption. Though many renewable resources do not have such a rapid recovery rate, these resources are susceptible to depletion by overuse. Resources from a human use perspective are classified as renewable so long as the rate of replenishment/recovery exceeds that of the rate of consumption. Renewable resources replenish easily when compared to non-renewable resources. River are a key natural resource for
Uganda. •
Non-renewable resources: These resources are formed over a long
geological time period in the environment and cannot be renewed easily. Minerals are the most common resource included in this category. From the human perspective, resources are non-renewable when their rate of consumption exceeds the rate of replenishment/recovery; a good example of this is
fossil fuels, which are in this category because their rate of formation is extremely slow (potentially millions of years), meaning they are considered non-renewable. Some resources naturally deplete in amount without human interference, the most notable of these being radioactive elements such as uranium, which naturally decay into heavy metals. Of these, the metallic minerals can be reused by
recycling them, but coal and petroleum cannot be recycled.
Ownership •
Individual resources: Resources owned
privately by individuals. These include plots, houses,
plantations,
pastures,
ponds, etc. •
Community resources: Resources that are accessible to all the members of a
community, e.g., cemeteries. •
National resources: Resources that belong to the
nation. The nation has legal powers to acquire them for public welfare. These also include minerals, forests and
wildlife within the
political boundaries and
Exclusive economic zone. •
International resources: These resources are regulated by
international organizations, e.g.:
International waters. == Extraction ==