By Namit Sharma, Bram Smeets, and Christer Tryggestad
It’s long been axiomatic that economic growth and energy demand are linked. As economies grow, energy demand increases; if energy is constrained, GDP growth pulls back in turn. That’s been the case since the dawn of the Industrial Revolution, if not long before.
But past is not always prologue. Our latest global energy perspective—part of a multiyear research effort examining the supply and demand of 55 types of energy across 30 sectors in some 146 countries—suggests that we’re beginning to see a decoupling between the rates of economic growth and energy demand, which in the decades ahead will become even more pronounced.
That’s not because the world will be less “energy hungry.” People will continue to use energy in their daily lives, and happily, in the decades ahead, more people will have access to more modern appliances and on-the-grid housing. Businesses will still need energy to run; economies will require it to grow. Nonetheless, new technologies and larger trends should cause the energy demand curve to flatten.
Indeed, the energy landscape as we know it is poised for foundational change between now and 2050. What does this mean for companies and their leaders? For starters, your core business model may be tested, and new opportunities—and challenges—beyond it will almost certainly arise. Moreover, determining the right path will require companies to adapt both urgently and in measured stages. Navigating the great decoupling will take resilience. Farsighted leaders should start preparing now.
Energy and industrialization: A slow burn
Energy demand has long tracked economic growth. So much so that for the past two centuries, the amounts of energy that economies need have increased virtually in lockstep with the amounts of wealth that economies create. And, to a remarkable degree, wealth creation has depended on a society’s proficiency at burning things.
In 1800, the fuel of choice was biomass, such as wood from fallen trees. Even during the latter half of the 19th century, after the United States and parts of Europe had begun to industrialize, many economies ran primarily on biomass. Biomass was highly inefficient as fuel, as almost all of its embodied energy was lost in its burning. Still, before widespread industrialization, the conversion loss was bearable; generally, there was enough wood to burn to make economies grow. The resulting wealth creation wasn’t enormous, but it was pointing up. Primary energy demand (the demand for energy in its raw form, before it has been converted to secondary energy such as electricity or district heating) pointed up as well, growing at about 1 percent per year from 1850 to 1900.
Then, at the turn of the 20th century, rates of both energy demand and economic growth took off. From 1900 to 1950—as horses gave way to cars, oil lamps to electric lighting, and ice boxes to refrigerators—primary energy demand nearly doubled. Economic growth rates soared as well; in the United States (by far the largest economy in the world), GDP per capita in 1950 was more than twice that of 1900.1 For that level of wealth creation, burning trees and other forms of biomass wouldn’t suffice.
But burning fossil fuels would suffice, and the 20th century’s embrace of petroleum (to accompany coal) sent production and consumption into overdrive. Fossil fuels lose about 40 to 70 percent of their embodied energy when converted into electrical or mechanical energy—a lot, but not when compared with the near-total loss incurred by burning wood. While larger economies need more tons of coal and barrels of petroleum to grow faster, the burning goes a longer way (Exhibit 1).
Exhibit 1
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Over the second half of the 20th century, with living standards in the West and other advanced economies rising, the growth in energy demand accelerated even more. Those dynamics have continued into this century, as China has helped power global GDP to a median rise of 3.7 percent per year since 2000, with global energy demand continuing to rise as well. And 21st-century economies will continue their ascent. The world population will continue to grow, potentially reaching ten billion by midcentury; the plateauing of Chinese and Organisation for Economic Co-operation and Development (OECD) populations will be more than offset by significant increases in India, other parts of Asia, and, especially, Africa, where more than 50 percent of the world’s projected population increases will occur through 2050.
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Nonetheless, our analysis suggests that while a more populous world will create more wealth than ever, energy demand rates will plateau and demand rates for fossil fuels will begin to declineworldwide. How can that be?
Decoupling energy demand from economic growth
The decoupling of the rates of economic growth (climbing steadily) and energy demand growth (ascending, but less steeply) will largely be a function of the following four forces:
a steep decline in energy intensity of GDP, primarily the consequence of a continuing shift from industrial to service economies in fast-growing countries such as India and China
a marked increase in energy efficiency, the result of technological improvements and behavioral changes
the rise of electrification, in itself a more efficient way to meet energy needs in many applications
the growing use of renewables—resources that don’t need to be burned to generate power—a trend with the potential not only to flatten the primary energy demand curve but also to utterly change the way we think about power
These drivers will rewrite the world’s growth-and-energy story and thus have big implications for a range of industries. Each driver is worth a closer look.
Service economies and the decline of energy intensity
Advanced economies tend to become service economies, and the energy intensity of service sectors is substantially lower than that of industrial sectors—in some cases, as low as one-twentieth. Services already are dominant within OECD countries, with the service sector in the United States, for example, contributing about 80 percent to national GDP. In China and India, lately two of the greatest engines for energy demand, the share of services in GDP will grow by almost ten percentage points in the next two decades.
The efficiency effect
The second factor checking energy demand is the increased efficiency with which energy is put to use. While a growing middle class in many emerging economies will trigger spectacular increases in the demand for products such as refrigerators, laundry machines, and air conditioners, advances in LED lighting, smart appliances, and other applications will substantially lessen the energy intensity of households worldwide. In more developed countries—and to an extent, globally—changes in users’ mind-sets will also boost efficiency. Not only are people beginning to be more conscious about their behavior (such as turning off lights and air conditioners when they’re not in use), they’re benefitting from innovations such as automatic sensors and controlled devices, which eliminate the bother of worrying about such things.
Companies across sectors will reap the benefits as well. Precisely, because energy costs can comprise a significant share of total expenses in a variety of business models, energy savings often have an outsized effect on the bottom line. This incents implementation of efficiency measures and makes it likely that large-scale improvements will come faster. And while it is conceivable that if electricity costs decline dramatically, incentives to change behavior, invest in efficiencies, and alter consumption patterns could be diminished as a result, so far the trends toward efficiency continue unabated as the demand for electric power grows. Government-mandated standards will also help accelerate adoption and enforce switching. Efficiency investments that are more quickly in the money, such as lighting and improved heating, ventilation, and air-conditioning (HVAC) systems, will likely be implemented first. Yet even projects with longer payback times and more expensive efforts, such as significant decarbonization initiatives, will eventually be commercialized, tamp down energy needs over the longer term, and prove a net positive for value creation.
For plants and factories, energy efficiencies will manifestly help move the needle. Within the global buildings segment, energy intensity will decline as new, energy-efficient technologies are adopted. As a result, the energy needs per capita at a global level will be 10 percent less in 2050 than they were in 2016, despite the rapid rise in demand from the many households entering the middle class in emerging economies. And the transportation sector will realize some of the most dramatic efficiencies of all. The shift to electric vehicles (EVs), combined with improvements to internal-combustion-engine (ICE) vehicles, means that overall energy needs for road transport will increase only slightly—even while the total number of cars and trucks on the world’s roads will likely more than double.2
The rise of electrification
A third reason why energy demand should plateau is the promise of electrification. Combustion-powered motors top out at about 40 percent efficiency; electric motors can exceed 90 percent. Given forecasted declines in electric-battery costs, passenger-car EVs could reach cost parity with their ICE-powered counterparts before 2025, with many larger types of vehicles reaching price parity soon thereafter. The rise of EVs will not only shift demand from petroleum, it will also curb the total amount of energy required for road transportation. For passenger cars, electric motors require less than one-third the energy as ICE motors for every kilometer driven. Critically important as well to the overall energy mix is exposure to price signals; oil is becoming significantly more price elastic (for more about our modeling assumptions and conclusions, see sidebar “Methodology and aggregate conclusions”).
The growth of renewables
The growth of renewables is essential to understanding why the primary energy demand curve will level off between now and 2050. When we think about how much gasoline our cars need to go, how much electricity needs to come out of a socket to make an appliance work, and how much coal, natural gas, or nuclear fuel must be fed into a power plant to generate the steam that turns the turbines, we naturally start with the amount of fuel inputs needed. With renewables, however, those metrics are practically meaningless. We don’t measure what fuels a solar panel or pushes a windmill—we measure the energy that comes out.
Most important, the near total absence of any conversion loss is radically different: nothing is lost in the burning. Nor do sunshine or wind power need to be generated at large, centralized plants; companies, and indeed individual consumers, can in many cases harness the energy on-site. While most businesses will not be able to go completely or even largely off the grid, many will be able to lessen their electrical costs materially—and some, particularly large retailers, may even in certain locations produce a net energy surplus.
Of course, these types of renewable energy need to be captured and stored. Technological improvements to solve those challenges and reduce costs substantially, however, are in process. The levelized cost of energy (that is, the net present value of the unit cost of electricity over an asset’s lifetime) for renewables has been declining remarkably during the past two decades. We expect that by 2020, wind and solar generation will be cheaper than electricity generated conventionally by new-build coal and natural-gas plants, almost everywhere. By 2025, renewables should be competitive even with the marginal cost of just running existing conventional plants in many countries and regions (Exhibit 2). Our analysis further suggests that renewables, including wind, solar, and also hydro power, will provide more than half of the world’s electricity by 2035.
Exhibit 2
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The growing use of renewables will affect the future energy mix. Among fossil fuels, only natural gas, which is poised to grow rapidly as a fuel source in the coming 15 years, is likely to maintain a constant share (through 2050, at least); demand for coal, and then oil, will level off and then decline (see sidebar “The evolving energy mix”). Renewables’ share, by contrast, will increase steadily through to midcentury.
An important implication is that global energy-related emissions, compared with 2016 levels, should fall by approximately 20 percent by 2050. That’s significant, but not decisive. Absent more aggressive action, the current reductions in emissions by some countries won’t be enough to put the world on the “two-degree pathway” deemed essential by the 2016 Paris Agreement. It’s quite possible, therefore, that governments will implement more substantive policies to meet emissions targets.
A playbook for energy resilience
Advances in efficiency are a net positive, but they also will roil through industries and companies in complex ways. Navigating the energy changes, therefore, and continuing to adapt as the foundations shift will take resilience.
Once more, consider EVs. Five years ago, though you’d have perhaps driven a Prius, Tesla, or Leaf, electric cars were still just a tiny niche, comprising only 0.4 percent of new-car sales in 2014. In 2018, the share of new-car EVs has more than tripled—and that’s as a global average. In several countries, the share exceeds 5 percent. In Norway, with the support of aggressive regulatory incentives, EVs make up about 40 percent of new-car sales—and the level is rising. Every major automaker is moving aggressively to add EVs to their portfolios, with new players joining worldwide. That will transform not only the mix of cars on the roads but also the very definition of mobility: from the inevitable growth of charging stations to the possible reinvention of the dealer-maintenance model (let alone car insurance), as autonomous vehicles change mobility further. What were once “best guesses,” something to be aware of over the next decade, have become key inputs that can make or break a project’s net present value today.
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