Global energy consumption is rising because the human population is increasing and average per capita energy demand is also growing. Economic development, urbanization, industrialization, transport, and wider access to electricity all increase the energy used by societies.
This is IB ESS Subtopic 7.2: Energy sources: uses and management, and it is studied at both SL and HL. The central relationship can be summarized as:
Therefore, total consumption can rise even if energy efficiency improves, because increases in population and economic activity may outweigh efficiency savings.
| Driver | Mechanism increasing consumption | Example |
|---|---|---|
| Population growth | More people require electricity, heating, cooling, transport, and manufactured goods. | Rapid population growth increases residential and infrastructure demand in many parts of sub-Saharan Africa. |
| Economic development | Higher incomes increase ownership of vehicles, appliances, and electronic devices. | Industrialization and rising incomes have increased energy demand in China. |
| Urbanization | Cities require buildings, transport networks, water treatment, and other energy-intensive infrastructure. | Expanding Indian cities require more electricity and transport energy. |
| Industrialization | Manufacturing, mining, construction, and processing consume large quantities of energy. | Steel and cement production depend heavily on high-energy processes. |
| Improved energy access | Electrification raises consumption but can improve health, education, and economic opportunity. | Rural electrification replaces limited traditional energy use with electricity demand. |
A common misconception is that renewable energy automatically reduces total energy consumption. Renewables change the energy mix and may reduce greenhouse gas emissions, but they do not necessarily reduce the amount of energy demanded.
Rising consumption creates tensions between energy security, environmental sustainability, and environmental justice. Higher-income populations often consume more energy, while lower-income communities may still lack affordable and reliable access.
Exam technique: For an “explain” question, identify population growth and rising per capita demand, then develop each with a clear causal chain. Distinguish total consumption from per capita consumption and support the explanation with a named example.