Understanding Energy Consumption Sources
Energy consumption can be categorized into two main sources: commercial and non-commercial. In many regions, particularly in developing countries, non-commercial energy sources play a significant role in total energy consumption.

What is Non-Commercial Energy?
- Non-commercial energy refers to energy sources that are not traded in commercial markets.
- This includes traditional biomass (like wood, agricultural waste), animal dung, and other forms of renewable energy used for cooking, heating, and other household needs.

Contribution to Total Energy Consumption
- Non-commercial sources account for around 30% of total energy consumption globally, particularly in rural areas.
- These energy sources are vital for households that do not have access to modern energy systems or rely on them for their daily energy needs.

Why Non-Commercial Sources are Significant?
- **Accessibility**: Non-commercial energy is often more accessible to low-income households.
- **Affordability**: It usually comes at a lower cost than commercially traded energy sources.
- **Cultural Relevance**: Many communities have a long-standing tradition of using these energy sources.

Conclusion
In conclusion, the answer to the question about which energy source accounts for 30% of total energy consumption is indeed **non-commercial energy**. This highlights the importance of understanding diverse energy consumption patterns and the need for sustainable practices in using these energy sources.