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呼和浩特痔疮医院排名选东大
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发布时间: 2025-05-25 06:06:09北京青年报社官方账号
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  呼和浩特痔疮医院排名选东大   

WASHINGTON (AP) — For much of the United States, invasive grass species are making wildfires more frequent, especially in fire-prone California, a new study finds.Twelve non-native species act as "little arsonist grasses," said study co-author Bethany Bradley, a University of Massachusetts professor of environmental conservation.Wherever the common Mediterranean grass invades, including California's southern desert, fires flare up three times more often. And cheatgrass , which covers about one-third of the Intermountain West, is a big-time fire promoter, Bradley said."I would not be surprised at all if invasive grasses are playing a role in the current fires but I don't think we can attribute to them directly," Bradley said.University of Utah fire expert Phil Dennison, who wasn't part of the study but says it makes sense, said, "In a lot of ways, California was ground zero for invasive grasses. Much of California's native perennial grassland was replaced by Mediterranean annual grasses over a century ago. This study doesn't look at invasive grasses in the areas that are burning in California, but invasive grasses are contributing to the fires there."Experts say the areas burning now in California are more shrubs and grasses than forests, despite what President Donald Trump tweeted over the weekend."This is a global problem," said University of Alberta fire expert Mike Flannigan, who wasn't part of the study but said it makes sense. "I think with climate change and human assistance we are moving to a grass world. One region they should have mentioned is Hawaii where wildfires are increasing in large part due to invasive grasses."Invasive species are spreading more because of climate change as warmer weather moves into new areas, said study lead author Emily Fusco, also of the University of Massachusetts. New England and the Mid-Atlantic are seeing new invasive and more flammable grasses, Bradley said.The study in Monday's journal Proceedings of the National Academy of Sciences looks at the connections between a dozen species of invasive grasses and fires nationwide, finding fires occur more often in places with the non-native grasses. But the study did not find a link between invasive grasses and the size of the fires.Four of these species, including cheatgrass and common Mediterranean grass, are in California. These grasses get dry and then watch out, Fusco said."When you start a fire normally you want kindling," Fusco said. "The grasses are, more or less, like kindling"If someone lights a match and throws in the middle of a forest, it is unlikely a fire will start, but throw it in a field of cheatgrass "and odds are that it's going to catch," Bradley said."We are the reason that invasive species are here. We are the reason that they get spread around," Bradley said.Flanagan noted that invasive plants that are not grasses also feed the wildfire problem.While most outside experts said the study was important, wildfire expert LeRoy Westerling at the University of California, Merced said that with wildfires the size is key so this study is less valuable because it measures frequency.While size matters in forest fires, study author Bradley said mid to small size fires are the ones "in everybody's backyard" and affect people and their buildings more. 3313

  呼和浩特痔疮医院排名选东大   

WASHINGTON (AP) — A report from the Labor Department's inspector general says nearly 3,000 federal workers have filed compensation claims for contracting COVID-19 on the job. And that number is expected to double by early next month. Through mid-June, families of 48 federal workers also had filed death claims. The report only reflects the number of federal workers or their families who filed claims by June 16 — not the number who have contracted the coronavirus or died from it. Reports from individual agencies indicate the number of infections and deaths is much higher. The IG report is one of the first centralized assessments of the way the virus is affecting the federal workforce. 699

  呼和浩特痔疮医院排名选东大   

Viral news website Upworthy has laid off a significant chunk of its staff.More than 30 people were let go from the whole company, a spokesperson for Good Media Group confirmed to CNN. The company cited "an increasingly challenging media environment.""Today, we had to make the hard decision to say goodbye to esteemed colleagues," the company said in a statement. "An incredible team remains, and our mission is as relevant now as ever."Editor-in-chief Liz Heron wrote on Twitter that her "entire team" was laid off and she resigned. Senior staff writer Parker Molloy also confirmed her exit on Twitter. Eli Pariser, Upworthy's cofounder and co-CEO, stepped down last week. "I remain very grateful to all the smart, good-hearted people that helped to build something we all believed in," he wrote on Twitter.Upworthy skyrockted to viral fame in 2013 because of its catchy headlines and innovative mastery of Facebook's algorithm. The website is famous for headlines using the "curiosity gap," sentences that end in "You Won't Believe Why."At one point Upworthy attracted 85 million visitors.The website pivoted in 2015, writing original content and hired big names from the Wall Street Journal and New York Times. Good Media bought the website in 2017 and laid off staffers.It's the latest media company to lay off editorial staff. Over the past year, CNN, Vox, BuzzFeed, Vice, and most recently the New York Daily News all have laid off a number of people.Facebook and Google dominate digital advertising. Marketers are shifting their money to those two tech giants instead of advertising with smaller websites that can't precisely target certain demographics as well as Facebook and Google can.The-CNN-Wire 1716

  

WASHINGTON (AP) — A man suspected of fatally shooting a supporter of a right-wing group in Portland, Oregon, last week was killed as investigators moved in to arrest him. That's according to a senior Justice Department official who spoke to The Associated Press on Thursday. The man, Michael Reinoehl, was killed as a federal task force attempted to apprehend him in Lacey, Washington. The official says Reinoehl was the prime suspect in the killing of 39-year-old Aaron “Jay” Danielson, who was shot in the chest Saturday night. 537

  

WAKE COUNTY, N.C. — A 22-year-old man has been charged after posting a video of himself driving 198 miles per hour in a Dodge Challenger SRT Hellcat, according to a KABC?report.In the video below, the driver and his friends can be seen celebrating after his car reached 198 mph on a North Carolina freeway.No, that's not a clip from a Fast and Furious movie.A Challenger SRT Hellcat starts at 707 horse power and tops out at about 200 mph. A 2018 version of the vehicle starts at about ,000.The video went viral online, and was eventually spotted by local police. Police say William Jefferson is now facing street racing and reckless driving charges. 671

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