China could meet all of its future electricity needs with wind power if the government continues to subsidize the development of wind farms with price guarantees, a study published on Thursday said.
Already the world’s largest emitter of carbon dioxide, China’s electricity needs are expected to double in the next two decades and it is currently adding several new coal-fired power plants to its grid every week.
“The real question for the globe is: What alternatives does China have?” said lead author Michael McElroy of Harvard’s School of Engineering and Applied Sciences.
McElroy’s team used meteorological and geographical data to calculate China’s total wind capacity and then estimated how much power could be delivered profitably at different floor prices.
They found that wind energy providers could profitably supply all of China’s projected electricity demand by 2030 if they receive at least 0.516 yuan (US$0.076) per kilowatt hour for the first 10 years.
That’s in line with the price guarantees China has awarded in recent concessions to wind farm operators which ranged from 0.382 to 0.551 yuan per kilowatt hour.
“This suggests that it would be possible to eliminate much if not all of the carbon dioxide expected to be emitted by the power sector over the foreseeable future,” the study published in the journal Science concluded.
A contract price as low as 0.4 yuan per year would be sufficient to displace 23 percent of energy generated by coal, the study said.
“This would require a major investment of resources and could be accomplished only on the basis of a carefully designed long-range plan for the Chinese power sector,” the authors wrote.
“Benefits in terms of improvements in Chinese air quality would be substantial, however, and there could be important benefits also for the Chinese economy,” they said.
By contrast, meeting future needs with coal could increase carbon emissions by 3.5 gigatonnes a year from the current annual level of 6.6 gigatonnes. Health problems caused by air pollution are estimated to cost 0.7 percent to 4.3 percent of China’s GDP, the authors said.
And while they estimate it would cost about 6 trillion yuan (US$900 billion) to introduce 640 gigawatts of wind power over the next 20 years, they said it is just a fraction of China’s current annual GDP of about 26 trillion yuan and major investments in generating capacity must be made regardless.
China’s future energy needs could also be met without radically altering its landscape or displacing farmers, the authors said.
A network of wind turbines operating at as little as 20 percent of their capacity would be able to produce as much as 24.7 petawatt hours of electricity annually, which is seven times the country’s current consumption.
“Wind farms would only need to take up land areas of 0.5 million square kilometers, or regions about three quarters of the size of Texas,” said co-author Xi Lu, a graduate student in McElroy’s group at Harvard. “The physical footprints of wind turbines would be even smaller, allowing the areas to remain agricultural.”
With much pomp and circumstance, Cairo is today to inaugurate the long-awaited Grand Egyptian Museum (GEM), widely presented as the crowning jewel on authorities’ efforts to overhaul the country’s vital tourism industry. With a panoramic view of the Giza pyramids plateau, the museum houses thousands of artifacts spanning more than 5,000 years of Egyptian antiquity at a whopping cost of more than US$1 billion. More than two decades in the making, the ultra-modern museum anticipates 5 million visitors annually, with never-before-seen relics on display. In the run-up to the grand opening, Egyptian media and official statements have hailed the “historic moment,” describing the
SECRETIVE SECT: Tetsuya Yamagami was said to have held a grudge against the Unification Church for bankrupting his family after his mother donated about ￥100m The gunman accused of killing former Japanese prime minister Shinzo Abe yesterday pleaded guilty, three years after the assassination in broad daylight shocked the world. The slaying forced a reckoning in a nation with little experience of gun violence, and ignited scrutiny of alleged ties between prominent conservative lawmakers and a secretive sect, the Unification Church. “Everything is true,” Tetsuya Yamagami said at a court in the western city of Nara, admitting to murdering the nation’s longest-serving leader in July 2022. The 45-year-old was led into the room by four security officials. When the judge asked him to state his name, Yamagami, who
DEADLY PREDATORS: In New South Wales, smart drumlines — anchored buoys with baited hooks — send an alert when a shark bites, allowing the sharks to be tagged High above Sydney’s beaches, drones seek one of the world’s deadliest predators, scanning for the flick of a tail, the swish of a fin or a shadow slipping through the swell. Australia’s oceans are teeming with sharks, with great whites topping the list of species that might fatally chomp a human. Undeterred, Australians flock to the sea in huge numbers — with a survey last year showing that nearly two-thirds of the population made a total of 650 million coastal visits in a single year. Many beach lovers accept the risks. When a shark killed surfer Mercury Psillakis off a northern Sydney beach last
‘CHILD PORNOGRAPHY’: The doll on Shein’s Web site measure about 80cm in height, and it was holding a teddy bear in a photo published by a daily newspaper France’s anti-fraud unit on Saturday said it had reported Asian e-commerce giant Shein (希音) for selling what it described as “sex dolls with a childlike appearance.” The French Directorate General for Competition, Consumer Affairs and Fraud Control (DGCCRF) said in a statement that the “description and categorization” of the items on Shein’s Web site “make it difficult to doubt the child pornography nature of the content.” Shortly after the statement, Shein announced that the dolls in question had been withdrawn from its platform and that it had launched an internal inquiry. On its Web site, Le Parisien daily published a
RSS