Country Y uses its scarce foreign-exchange reserves to buy scrap iron for recycling into steel；Although the steel thus produced earns more foreign exchange than it costs, that policy is foolish；Country Y's own territory has vast deposits of iron ore, which can be mined with minimal expenditure of foreign exchange.

Which of the following, if true, provides the strongest support for Country Y's policy of buying scrap iron abroad?

【选项】Scrap iron is now used in the production of roughly half the steel used in the world today, and experts predict that scrap iron will be used even more extensively in the future.