Edison will buy U.S. LNG from 2028 under a 15-year agreement with a Shell subsidiary, as part of boosting Italy’s security of supply, the Italian energy group said on Wednesday. Edison has signed an agreement with Shell International Trading Middle East Limited FZ to buy around 0.7 million tons per year of LNG from the United States, starting in 2028 and continuing for up to 15 years. The Italian firm, part of France’s EDF Group, will purchase the gas on a Free on Board (FOB) basis, using its own fleet of LNG carriers, taking…