Feb 24 The long-awaited first liquefied natural gas exports from the lower 48 U.S. states will leave Cheniere Energy Inc's Sabine Pass export terminal in Louisiana on Wednesday, a senior company executive said. That first cargo of about 3 billion cubic feet of gas will go to Petrobras in Brazil, Meg Gentle, executive vice-president of marketing at Cheniere said on the sidelines of the CERAWeek conference in Houston.