Fixed Stock of Non-Renewable Resources
The statement "we have a fixed stock of non-renewable resources on earth which cannot be replenished" means that resources like fossil fuels (coal, oil, natural gas), minerals, and metals are limited in quantity and will eventually be depleted. Once these resources are used up, they cannot be replaced or regenerated.

Measures to Overcome Resource Depletion
- Transition to Renewable Energy Sources: One of the most effective ways to overcome the problem of non-renewable resource depletion is to transition to renewable energy sources such as solar, wind, hydroelectric, and geothermal energy. These sources are sustainable and do not deplete natural resources.
- Efficient Resource Management: Implementing efficient resource management practices can help in conserving non-renewable resources. This includes reducing waste, recycling materials, and using resources more efficiently.
- Investing in Research and Development: Investing in research and development of new technologies can lead to the discovery of alternative materials and energy sources that are more sustainable and environmentally friendly.
- Promoting Sustainable Practices: Encouraging individuals, businesses, and governments to adopt sustainable practices such as reducing consumption, using eco-friendly products, and conserving resources can help in prolonging the life of non-renewable resources.
- International Cooperation: Collaborating with other countries to develop strategies for managing and conserving non-renewable resources on a global scale can help in addressing the issue of resource depletion.
By implementing these measures, we can work towards mitigating the problem of non-renewable resource depletion and ensure a more sustainable future for generations to come.