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GNC, the retail chain that specializes in vitamin and dietary supplements, has filed for bankruptcy and says it will close up to 1,200 stores.The 85-year-old company is more than billion in debt and was already facing declining sales at brick-and-mortar locations prior to the pandemic. GNC said re-financing plans were in the works earlier this year, but COVID-19 prevented the company from carrying them out.The company says it expects to emerge from bankruptcy in the fall."The Chapter 11 process will allow us to accelerate these strategies and invest in the appropriate areas to evolve in the future, while improving our capital structure and balance sheet," GNC said in a letter to shoppers.According to CNN, GNC reported losses of 0 million in the first quarter after 30 percent of its stores in the U.S. and Canada were forced to close. The company lost million in that same time span in 2019. 919

Hot weather can increase the risk of natural disasters like droughts and wildfires, now, there is evidence extreme heat can increase harmful chemicals in the air.A study published recently in Science Advances looked at asphalt under different temperature conditions.“A main finding is that asphalt-related products emit substantial and diverse mixtures of organic compounds into the air, with a strong dependence on temperature and other environmental conditions,” says Peeyush Khare, a Yale chemical and environmental engineer and the lead author of the study, in a statement.The researchers took real-world samples of fresh road asphalt and put them in a controlled furnace with purified air. They heated the samples to temperatures between 104 and 392 degrees Fahrenheit, and measured the chemical components in the air.Total emissions nearly doubled when temperatures went from 104 to 140 degrees. At 104 degrees, 94 percent of the emissions measured were hydrocarbons.The group also exposed the asphalt samples to replicated solar heat, including UVA and UVB wavelengths, and found the rate of emission of potentially harmful chemicals increased. Showing that not only heat, but also solar radiation contributed to asphalt producing air pollution.Paved surfaces and roofs make up approximately 45% and 20% of surfaces in U.S. cities, respectively.Asphalt can be quite a bit hotter than the air around it, getting about 40 to 60 degrees warmer than the recorded air temperature.The researchers concluded that while policies and regulations have been put in place about car emissions and other forms of air pollution, asphalt should not be overlooked as a contributor.“It's another important non-combustion source of emissions that contributes to SOA (secondary organic aerosol) production, among a class of sources that scientists in the field are actively working to constrain better,” Drew Gentner, associate professor of chemical & environmental engineering, said. 1983

Google has marked Mexico's Day of the Dead, an ancient festival celebrating and honoring departed loved ones, with a doodle featuring brightly painted model skulls.The skulls, hand-made from clay, appear between animated flickering candles with orange marigold petals scattered around them. The doodle represents the ofrendas, or altars, set up by families for the carnival.The shrines typically feature photographs and treasured mementos of late relatives and friends, plus their favorite foods and drinks.A type of sweet roll known as dead bread and sugar skulls are also often included, along with orange candles and incense. Homes are decorated with sprays of marigolds as part of the tradition.Revelers in colorful costumes with skulls painted on their faces parade through the centers of towns, and a host of celebrations and parties take place. Offerings are placed in graveyards and at the sides of roads. 921

Grateful for all of the law enforcement officers who support us and help get us safely to where we are going each day. Thank you for all you do!— Mike Pence (@Mike_Pence) July 30, 2020 192

FULLERTON, Calif. (AP) — Police say a suspect has been arrested in the stabbing death of a man at the California State University, Fullerton campus.Fullerton police Lt. Jon Radus on Thursday told The Associated Press that 51-year-old Chuyen Vo was arrested Wednesday night at his home in Huntington Beach. Vo is suspected in the death of a former co-worker, 57-year-old Steven Shek Keung Chan. Police would not elaborate on the work relationship between the two men.Chan worked as the director of budget and finance and student services for university extended education but retired in 2017. He returned to the campus in January to work as a consultant.Authorities have said Chan was found stabbed numerous times inside his silver Infiniti in a campus parking lot on Monday, and they believe it was a targeted attack. 825

来源：资阳报