Answer: Stock resources are non-renewable because they can be used indefinitely. Instead of rates, their quantity is frequently given in absolute amounts. Coal or petroleum reserves were two instances. Water, for instance, is a mixture of two combustible gases, hydrogen and oxygen, that can be utilised to generate a lot of energy. However, we lack the necessary technical ‘know-how’ to put them to this use. As a result, it might be classified as understock.
Potential Resources: Potential Resources have not yet been fully utilised. We now can extract them, but we’ve not begun doing so on a significant scale yet. The low investment could be one of the reasons; for example, Rajasthan and Gujarat receive a lot of solar energy and have a lot of wind energy. However, the utilisation of such resources is still not fully explored yet.
Developed Resources: Developed Resources are those whose quality and quantity have been assessed but whose utilisation has now been defined. On the other side, development is founded on technology and its practicality.
Reserve Resources: Reserve Resources are those that, despite technical advancements, we are not currently extracting. They were kept in terms of meeting the world’s future needs.