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CHICAGO - The US oil and gas industry emits 13 million metric tons of methane from its operations each year, nearly 60 percent more than current estimates, according to a national study involving University of Michigan (UM) researchers.

CSRC has also released amended rules on initial public offerings (IPO) and a package of measures to support innovative firms in their domestic issuance of stocks or CDRs.

CRE is the railway freight service linking China and Europe. According to China Railway Corporation, in the first half of this year, the service has linked 48 Chinese cities with 42 cities in 14 European states and 2,497 trains traveled the route, a 69-percent rise compared with the same period of last year.

California's Joshua Tree National Park, with more than 792,000 acres, closed its campgrounds on Wednesday.

California is among the states with the most stringent gun laws in the US. It's illegal to sell handguns to anyone under age 21, while the federal minimum age to purchase a firearm is 18. The state also has banned assault weapons since 1989, which inspired a 10-year federal assault weapons ban that expired in 2004.