Oil and gas prices jump as conflict escalates
If there’s one takeaway from the N.T.S.B. statistics, it’s this: flight attendants are in a hazardous business. When planes hit turbulence, the pilots and passengers are usually in their seats. The flight attendants are often still on their feet. They get nearly eighty per cent of the serious injuries caused by turbulence, and, for every one of those injuries, a 2001 study found, another seventy flight attendants get minor injuries. Nearly a third of the time, they have no idea the turbulence is coming.
，这一点在91视频中也有详细论述
而臭氧污染已成为我国空气治理的新挑战。近十年来，全国平均臭氧浓度持续攀升，并在近三年来稳定维持在144微克/立方米左右。
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