呼和浩特治疗脱肛大概多少费用(回民区痔疮手术医保医院) (今日更新中)

Scientists are proposing an ingenious but as-yet-unproven way to tackle climate change: spraying sun-dimming chemicals into the Earth's atmosphere.The research by scientists at Harvard and Yale universities, published in the journal Environmental Research Letters, proposes using a technique known as stratospheric aerosol injection, which they say could cut the rate of global warming in half.The technique would involve spraying large amounts of sulfate particles into the Earth's lower stratosphere at altitudes as high as 12 miles. The scientists propose delivering the sulfates with specially designed high-altitude aircraft, balloons or large naval-style guns.Despite the technology being undeveloped and with no existing aircraft suitable for adaptation, the researchers say that "developing a new, purpose-built tanker with substantial payload capabilities would neither be technologically difficult nor prohibitively expensive."They estimate the total cost of launching a hypothetical system in 15 years' time at around .5 billion, with running costs of .25 billion a year over a 15-year period.The report does, however, acknowledge that the technique is purely hypothetical."We make no judgment about the desirability of SAI," the report states. "We simply show that a hypothetical deployment program commencing 15 years hence, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective. It would also be remarkably inexpensive."The researchers also acknowledge potential risks: coordination between multiple countries in both hemispheres would be required, and stratospheric aerosol injection techniques could jeopardize crop yields, lead to droughts or cause extreme weather.The proposals also don't address the issue of rising greenhouse gas emissions, which are a leading cause of global warming.And despite the conviction of the report's authors, other experts were skeptical."From the point of view of climate economics, solar radiation management is still a much worse solution than greenhouse gas emissions: more costly and much more risky over the long run," said Philippe Thalmann of the école Polytechnique Fédérale de Lausanne, an expert in the economics of climate change.David Archer of the Department of Geophysical Science at the University of Chicago said, "The problem with engineering climate in this way is that it's only a temporary Band-Aid covering a problem that will persist essentially forever, actually hundreds of thousands of years for fossil fuel CO2 to finally go away naturally."It will be tempting to continue to procrastinate on cleaning up our energy system, but we'd be leaving the planet on a form of life-support. If a future generation failed to pay their climate bill they would get all of our warming all at once." 2830

SANTA ANA, Calif. (AP) — Southern California authorities say 18 pounds (8 kilograms) of fentanyl have been seized in Orange County — enough of the synthetic opioid to create four million lethal doses.The Orange County Register reports the seizure last week yielded almost half the amount of fentanyl seized by authorities in the county during all of 2018 — a sign the drug is quickly growing into a substantial public threat.Sheriff's officials say investigators served a search warrant and arrested 60-year-old Rudolph Garcia on multiple drug charges. It wasn't known if Garcia has an attorney.Investigators also seized a semi-automatic handgun, heroin, methamphetamine, and ,000 in cash.According to the California Department of Public Health, deaths in Orange County attributed to fentanyl have risen from 14 five years ago to 93 in 2018. 852

SAN JOSE, Calif. (AP) — The Mercury News reports that California’s largest utility company said its equipment might have caused a fatal wildfire last month in Northern California.Investigators for the state have seized some of Pacific Gas & Electric’s gear in connection with the blaze, known as the Zogg fire, the company told state regulators. The blaze broke out Sept. 27 near the Shasta County town of Igo. The Shasta County wildfire began in the vicinity of Zogg Mine Road and Jenny Bird Lane. The utility has reported the incident to the state Public Utilities Commission. 590

SAN MARCOS, Calif. (KGTV) -- A San Marcos man had to rush his small dog to the hospital after the animal was bitten by a rattlesnake that somehow managed to get into the home.Ross Margolin says he came home to feed his five dogs when he heard the dogs in the other room barking at something.When he walked into the kitchen, he says he heard the unmistakable rattle. Margolin quickly called a company that specialized in getting snakes out of the house.The man who came to collect the rattlesnake was able to quickly get the two and a half foot long reptile out of the home. Margolin says he later noticed one of his dogs was bitten by the snake.Fortunately, Margolin says his dog quickly recovered after being rushed to the animal hospital for treatment. Margolin says the snake was able to get into the home through an open sliding door.  857

SAVANNAH, Tenn. — A Tennessee mother and her boyfriend have been accused of force-feeding batteries to a small child.A grand jury indicted the two adults – 21-year-old Kristina Thompson and 19-year-old Lucas Todd – in the case. They’re accused of forcing a child under the age of 8 to eat several AA and AAA batteries with the intention of causing serious bodily harm. The child also suffered several bruises and fractured bones. He or she is expected to recover.If convicted of aggravated child abuse, the suspects face a minimum prison sentence of 15 years.  583

来源：资阳报