Senior Bush administration officials are concerned that there may be shortages of natural gas as a result of damage from Hurricane Katrina. Although this is likely to increase prices for heating fuel this winter -- by as much as 71 percent -- the impact on fertilizer production is still unknown, but likely to increase as well. How soon that increase bears on the market is unknown as well.

The problem is hightened because, unlike with crude oil, there is no established international market for natural gas, according to Interior Secretary Gail Norton in a story by The Associated Press.

Yahoo News, Dealer Update, The Associated Press