Global Energy Trends and Data

Picture two households: one in Sydney running air-conditioning, a heated pool, two cars, and a plasma TV; one in rural Kenya with a single solar lamp and a cooking fire. Both are real households in 2022. The Sydney family consumed roughly 400 times more energy. A typical person in Qatar uses over 200,000 kWh per year, enough to power 20 Australian homes, while a typical person in sub-Saharan Africa uses less than 500 kWh. A typical person in sub-Saharan Africa uses less than 500 kWh per year. These disparities reflect wealth, industrialisation, climate, and infrastructure.

Understanding energy data requires reading carefully. Total energy tells you about a country's overall impact. Per-capita energy tells you about individual lifestyles. Energy intensity (energy per dollar of GDP) tells you about efficiency. Each metric tells a different story.

Reading energy data critically means asking: what is being measured, how was it measured, and what is left out? Official energy statistics often exclude traditional biomass (wood and dung burned for cooking), which provides about 10% of global energy but is invisible in many datasets. They may also exclude energy embedded in imported goods.

When Australia exports coal, the energy content is counted in our statistics but the emissions are counted in the importing country's statistics. This accounting choice can make exporters look cleaner and importers look dirtier than they really are in global terms.

Energy efficiency and energy consumption are different metrics. A wealthy country might use more total energy than a poor country while being more efficient per dollar of economic output. Comparing countries requires normalising for population, climate, economic structure, and other variables.

When evaluating claims about energy trends, check the units, the baseline year, and what is included or excluded. A claim that renewable energy has doubled might be true but misleading if the starting point was tiny. A claim that a country is carbon-neutral might ignore imported goods and aviation.

The cards above compare countries at one moment. A trend needs the same measurement repeated over many years, and the three levels the syllabus asks about tell three different stories.

Global. World primary energy use has roughly quadrupled since the 1960s and is still rising. The line is not smooth, though: it dips in 2009, during the global financial crisis, and in 2020, when COVID-19 lockdowns stopped travel and closed factories, then climbs again once the economy recovers. Those dips are evidence that energy demand is driven by economic activity and population, which is why most of today's growth comes from countries whose populations and incomes are still rising.

National. Australia's total energy use roughly doubled between the mid-1970s and the late 2000s, then levelled off at around 6,000 petajoules a year, even though the population kept growing. Energy use per person has been falling since about 2009. The data show that growth in demand is not automatic: more efficient appliances and buildings, and a shift in the economy away from some energy-intensive industries, flattened the curve.

State. In New South Wales, the electricity drawn from the grid has been roughly flat or falling for more than a decade, largely because millions of rooftop solar panels now supply homes directly in the middle of the day. Yet the Australian Energy Market Operator (AEMO) forecasts that electricity drawn from the eastern grid will roughly double by 2050, because cars, home heating, hot water and industry are expected to switch from petrol and gas to electricity.

That last point is the key to predicting future demand. Extending the past trend line forward assumes the future will behave like the past, and for electricity it will not: the same electrification that cuts total energy use and emissions increases electricity demand. Good predictions state their assumptions (population, economic growth, efficiency, electrification) and give a range rather than a single number.

While China is the world's largest total energy consumer, its per-capita consumption is still well below that of wealthy Western nations. China has over 1.4 billion people, so even moderate per-capita use adds up to enormous totals. This distinction between total and per-capita is crucial for fair international comparisons.

Many developing nations are now rapidly increasing their energy use as they industrialise and raise living standards. The global challenge is to help these countries develop using clean energy rather than replicating the fossil-fuelled path taken by today's wealthy nations.