Limited stock resources are known as non-renewable resources. Non-renewable resources are those that exist in limited quantities and cannot be replenished or regenerated within a short period of time. These resources take millions of years to form and once they are depleted, they cannot be easily replaced.

Key Points:
1. Definition of non-renewable resources: Non-renewable resources are natural resources that are present in limited quantities and cannot be replenished within a short period of time.
2. Formation of non-renewable resources: Non-renewable resources are formed over millions of years through geological processes such as the decomposition of organic matter, sedimentation, and fossilization.
3. Examples of non-renewable resources: Some examples of non-renewable resources include fossil fuels like coal, oil, and natural gas, as well as minerals like iron, copper, and gold.
4. Limited stock: Non-renewable resources have a limited stock because they take a long time to form and cannot be replenished at the same rate at which they are consumed.
5. Depletion of non-renewable resources: Due to their limited stock, non-renewable resources are being depleted at a rapid rate. Once these resources are exhausted, they cannot be replaced, leading to potential scarcity and environmental consequences.
6. Importance of conservation: The finite nature of non-renewable resources highlights the importance of conservation and sustainable use. It is crucial to find alternative sources of energy and promote renewable resources to reduce our dependence on non-renewable resources.
7. Environmental impact: The extraction and use of non-renewable resources often have significant environmental impacts, such as air and water pollution, habitat destruction, and greenhouse gas emissions.
8. Transition to renewable resources: As the world becomes more aware of the limitations and environmental consequences of non-renewable resources, there is a growing emphasis on transitioning to renewable resources such as solar, wind, and hydropower.

In conclusion, non-renewable resources are called resources of limited stock because they exist in finite quantities and cannot be easily replenished. Understanding the importance of conserving and transitioning to renewable resources is crucial for sustainable development and the future well-being of our planet.