(Bloomberg) -- A leaked draft of Treasury Department guidance for claiming hydrogen production tax credits under President Joe Biden’s climate law is drawing warnings from advocates that the requirements may stifle the burgeoning industry before it takes shape.Most Read from BloombergBiden Says He Might Not Have Sought Reelection If Trump Weren’t RunningTreasury Frenzy Drives 10-Year Yield Below 4.2%: Markets WrapTruck-Stop Billionaire Fights Warren Buffett to Increase $18 Billion Fortune India