The U.S. ambassador to the U.N. says the war with Iran could last another year, but he hopes Tehran will. Iran's parliament speaker Mohammad Bagher Ghalibaf on Sunday called for a campaign to cut gas consumption by at least 10%, with officials anticipating shortages as winter approaches.While a major producer, Iran has long suffered shortages of natural gas, essential for powering heating systems, which have been exacerbated by war with the United.