Over the next two decades, the worldâs energy system will undergo a huge transformation. Wind and solar power are poised to become dominant sources of electricity. Chinaâs once-relentless appetite for coal is set to wane. The amount of oil we use to fuel our cars could peak and decline.
But thereâs a catch: The global march toward clean energy still isnât happening fast enough to avoid dangerous global warming,Â at least not unless governments put forceful new policy measures in place to reduce carbon dioxide emissions.
Thatâs the conclusion of the International Energy Agency, which on Monday published its annualÂ World Energy Outlook, a 661-page report that forecasts global energy trends to 2040. These projections are especially difficult right now because the worldâs energy markets, which usually evolve gradually, are going through a major upheaval.
Here are some of the reportâs major themes:
Wind and solar are making gains
Around the world, the electricity sector âis experiencing its most dramatic transformation since its creation more than a century ago,â the report said. One big factor is the rapid growth of wind and solar power.
Over the past five years, the average cost of solar power has declined 65 percent and the cost of onshore wind has fallen 15 percent. The energy agency predicts those prices will keep tumbling as technology improves and governments scale back subsidies. Solar plants are becoming well-placed to outcompete new coal plants almost everywhere.
The agency sees renewable power supplying 40 percent of the worldâs electricity by 2040, up from 25 percent today. Even that forecast could prove conservative: In the past, the agencyÂ has underestimatedÂ the speed at which wind and solar power proliferate.
âOur solar expectations are about 20 percent higher than they were last year, both because of new policies in China and India and because the costs are coming down so fast,â said Fatih Birol, the agencyâs executive director.
The report warns, however, that many countries will need to retool their grids to manage the output from wind and solar plants, which run intermittently. That will mean overhauling rules for how electricity markets operate, relying on batteries and gas plants for grid flexibility and exploring new tools likeÂ hydrogen storage.
Coalâs boom days are over
For decades, developing countries like China and India have turned to coal as the cheapest, easiest way to power their economies and lift themselves out of poverty. Itâs a big reason carbon dioxide emissions have skyrocketed.
Thatâs quickly changing.
China, which burns half the worldâs coal, is making heavy investments in wind, solar, nuclear and natural gas, spurred in part byÂ concerns about air pollution from its coal plants. The agency now projects that Chinaâs coal consumption will plateau around 2025, with renewables overtaking coal as the countryâs biggest source of electricity by 2040.
And, while countries in Southeast Asia and elsewhere are still drawing up plans to build new coal plants, the agency expects this frenzy of construction to slow sharply after 2020.
But donât expect coal to disappear altogether. While the era of rapid coal growth is fading, the agency projects that global coal consumption could stay flat for decades. One reason for that: The average coal plant in Asia is less than 15 years old (compared to about 41 years in the United States).Â Those plants will keep polluting for decades, unless countries decide to retire them early or develop technology to capture and bury their emissions.
Oil wonât peak for a while yet
Even as the world puts hundreds of millions of new cars on the road, weâre increasingly using less oil to fuel them. The report projects that global oil use for cars will peak by the mid-2020s as countries ratchet up their fuel-economy standards and deploy more electric vehicles.
That doesnât mean overall oil use will decline, however. Only aboutÂ one-quarter of the worldâs oilÂ is used to fuel passenger cars. The rest is used to fuel freight trucks, ships, and airplanes; for heating; and to make plastics and other petrochemicals.
Those sectors havenât seen the same improvements in efficiency. As a result, the agency expects global oil demand to keep rising through 2040, led by developing countries.
Climate goals remain out of reach
Even with the impressive recent gains for renewable energy, the world is still far from solving global warming. Global carbon dioxide emissions rose 1.6 percent last year andÂ are on track to climb again this year. The report projects that emissions will keep rising slowly until 2040.
One reason: Carbon-free sources like wind, solar and nuclear power arenât yet growing fast enough to keep up with rising global energy demand, particularly in places like India and Southeast Asia. That means fossil fuel use keeps growing to fill the gap.
For this to change, nations will have to enact sweeping new policies, like investing in energy efficiency to slow demand growth,Â curbing methane leaks from oil and gas operations, and developing carbon capture technology for existing fossil fuel power plants and cement factories.
Governments will play a key role: The report notes that the world invests $2 trillion annually in energy infrastructure, and 70 percent of that is directed by state-owned companies or regulators. âThat tells me that our energy destiny will rely heavily on government decisions in the next two decades,â Mr. Birol said.