Liquefied natural gas from the United States has turned into a lifebelt for struggling Europe as Russia cut supplies via one of the biggest gas conduits into the continent. U.S. LNG will continue to play a crucial role in Europe’s gas supply. But it won’t be enough to avoid a major squeeze over the next three years. A recent study by Rystad Energy and funded by the American Petroleum Institute and the International Association for Oil & Gas Producers found that U.S. producers will remain the biggest LNG suppliers to European countries…