BEIJING - As they prepare to host the Olympics — an event whose very purpose is to push the limits of human beings — the Chinese are trying to do what man never has: Control the weather. With five months to go before the Summer Games come to Beijing, Chinese scientists say they are confident they can keep rain away from the opening ceremony, or summon a storm on cue to clear the city’s choking pollution. It’s a bold — and, according to international scientists, dubious — bit of stage managing, even for a nation that has already shown an outsize ambition to use the Olympics to showcase its development from rural poverty to economic powerhouse. China is spending $40 billion to remake the infrastructure of the ancient capital, and it already spends an estimated $100 million a year and employs 50,000 for rainmaking. At installations like one called Fragrant Hills, outside Beijing, peasants don military fatigues and helmets and squat behind anti-aircraft guns and rocket launchers, blasting the sky with silver iodide, hoping to shock rain from the clouds. If rain threatens the opening or closing ceremony, Beijing officials say they will set up several banks of rocket launchers outside the city to seed threatening clouds and cause them to release their rain before it reaches the capital. “We are now drafting the implementation plan for the artificial rain mitigation for the opening and closing ceremonies,” said Wang Yubin, a Beijing Meteorological Bureau engineer. “This is a very complex process, so we must select the right time and place.” China, short on water and arable land, has lavished some of the scarce resources it has on rainmaking and rain prevention. Nearly 11,000 weapons Its cloud-seeding weapons include 6,781 artillery guns and 4,110 rocket launchers, according to the state-run Xinhua news agency. The China Meteorological Administration says 4,231 flights for cloud-seeding were conducted from 1995 to 2003. The Chinese scientists say it worked — increasing rainfall during those years by 210 billion cubic meters, enough to meet the annual needs of 400 million people. China has a population of about 1.3 billion. Other scientists are not so sure. “I don’t think their chances of preventing rain are very high at all,” said Dr. Roelof Bruintjes, a meteorologist with the U.S. National Center for Atmospheric Research, who was in China several weeks ago and told top-ranking Chinese scientists he was skeptical. “If there is really a weather system that is producing rain, they won’t be able to do anything. We can’t chase away a cloud, and nobody can make a cloud, either.” The argument is about much more than precipitation theory. The Olympics, set to run Aug. 8-24, are tightly scheduled, and a rainy day can wreak havoc — particularly if the opening ceremony, perhaps China’s best showcase of the games, is a washout. Besides being one of the warmest months of the year in Beijing, with highs averaging in the mid-80s, August is among the wettest, with about 7 inches of rain in a typical year. It’s not the first time China has mounted a gargantuan project to bend nature. The Three Gorges dam project, spanning the mighty Yangtze River, is the largest hydroelectric undertaking in the world. But the history of Chinese science projects has its quirky examples, too — like the one that promises to produce softball-size tomatoes or giant gourds by shooting seeds or seedlings into space and then sowing them back on earth. Fifty years ago, during the Great Leap Forward, Mao Zedong made extravagant claims about new agricultural techniques that could lift China out of starvation. His plans to beat nature were based mostly on ideology and pseudo-science and caused widespread famine.
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