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Craft breweries across America have been on the front lines of businesses facing higher material costs because of inflation. Now, many are confronting a shortage of a key ingredient : carbon dioxide , the gas that gives beer its crisp, effervescent taste. And one brewer has already said it plans to shut down a key manufacturing plant and lay off workers as a result. Night Shift Brewing, in Everett, Massachusetts, just outside Boston, cited the CO2 shortage as the reason it is suspending operations at its longtime facility and outsourcing to nearby locations instead. "Come October 1, we won’t likely have jobs for many of this team," the company said in a statement on Instagram.  It's a slow-moving crisis that became worse this summer as reports emerged that the carbon dioxide sourced at Jackson Dome in Mississippi, one of the nation's largest gas production hubs, had been contaminated. Even before that, breweries were facing higher costs for raw materials like aluminu...