We tend to view rising energy demand as an inevitable result of economic development: population growth, improved living standards, and more complex industries naturally lead to increased energy consumption. However, recent scenario analyses by the International Energy Agency (IEA) repeatedly highlight a counterintuitive conclusion: in a highly electrified world with significantly improved efficiency, the total amount of final energy required globally may actually decrease, even as the economy continues to grow. This is not achieved through austerity, but by replacing an extremely inefficient system with a far more efficient one.
The core issue in today’s energy landscape is “too much waste.” We burn fossil fuels in large quantities and convert high-temperature, high-pressure energy into power or heat, resulting in staggering losses. Take heating as an example: the efficiency of natural gas water heaters typically ranges from 70% to 90%, with a significant portion of the generated heat wasted through the flue. Heat pumps operate on a fundamentally different logic; they do not create heat but rather transfer it, extracting warmth from the air or ground to bring indoors. For every unit of electricity consumed, they can provide 3 to 4 units of heating service. The heating remains unchanged, yet the energy required is reduced by more than half.
The same principle applies to transportation. The efficiency of internal combustion engine vehicles is constrained by thermodynamic limitations, with most gasoline burning off as waste heat and noise. Only a small fraction of the energy actually propels the vehicle forward. Electric vehicles circumvent this issue, as electrical energy is almost directly converted into mechanical power. Consequently, for the same distance traveled, an electric vehicle often requires only one-third, or even less, of the energy consumed by a gasoline vehicle. This is simply a matter of basic physical laws.
The kitchen serves as a microcosm of this phenomenon. Gas stoves disperse flames, with nearly all the heat wasted outside the pot; in contrast, induction cookers generate heat directly at the bottom of the pot, concentrating the heat. When cooking the same meal, the difference in ‘useful energy’ consumed between gas and electricity is substantial. These seemingly trivial daily scenarios collectively reflect the energy structure of society as a whole.
In addition to these three commonly cited examples, there are many other factors quietly reshaping energy demand. Lighting is a typical case; during the era of incandescent bulbs, most electricity was wasted as heat, but LED bulbs have nearly eliminated this waste, leading to a continuous decline in the proportion of electricity consumed for lighting and permanently lowering demand.
Industrial sectors also contain numerous overlooked efficiency gains. Electric motors are already more efficient than combustion engines, but when paired with variable frequency drives, they can precisely adjust power output according to actual loads, avoiding idling and excessive consumption. This can save electricity costs for factories and significantly reduce the demand for primary energy across the entire economy.
More importantly, electrification not only enhances end-use efficiency but also drastically reduces waste within the energy supply chain itself. Today, as much as 40% of the weight of goods transported globally by sea consists of coal, oil, and natural gas. A vast amount of shipping, fuel, labor, and time is expended merely to transport ‘fuel itself’ from one continent to another. This does not even account for the energy losses involved in liquefied natural gas cooling and regasification, as well as the energy consumed during the extraction, refining, and storage of oil. In a world dominated by electricity, energy is increasingly produced locally and transmitted via the grid, allowing for a significant reduction, or even elimination, of this lengthy and inefficient fuel logistics chain.
The IEA’s scenario models indicate that under a strong decarbonization pathway, global final energy demand may actually decline due to these efficiency differences being systematically aggregated. People’s lives do not become poorer; the levels of service for transportation, heating, lighting, and production do not diminish, yet the energy required to provide these services is significantly lower than in the past. There is no doubt that electricity demand will rise; however, ‘total energy’ and ‘electricity consumption’ are not the same thing.
We are currently living in a highly inefficient transitional era, using vast amounts of energy to compensate for outdated systems and technologies. As heat pumps, electric vehicles, and efficient motors gradually become mainstream, energy demand may decline even as the economy continues to grow. The issue has never been how much energy humanity requires, but rather whether we are still willing to use it in such an inefficient manner.
