“Prices creep up seasonably，” he said.“They might go up 10 percent, then down 5 percent.They never go back to where they started, but they creep.This is not creeping, this is drastic.”

　　Also to blame for the global wheat shortage is the rising population, coupled with increasing meat consumption worldwide.This has led to the increasing diversion of grain to animal feed.

　　Analysts anticipate that the shortage may be resolved within 12 months, as farmers pull fallow land into wheat production.But even when the shortage resolves, food prices are only expected to keep climbing due to other factors, such as high energy and shipping costs.

　　“It's not something that's going to go away，” Dinner said.“Food in general is going to go up.As wheat goes up, so does the price of eggs and chicken because they eat grain－based feed.It affects people who can't afford to pay more for their food.”

　　Public health experts have expressed concern about the effect that rising food prices have on the poor.The United Nations recently reported that in 2007, the cost of food imports in the world's neediest countries increased 24 percent, to a total of $107 billion.

　　【语篇解读】　气候变化引起干旱，干旱又引起小麦产量的下降，产量下降又引起小麦价格的上涨。

　　24．The indirect reason for a drop in wheat production is ________．

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