21.   A longer-than-expected closing could boost copper prices, because the Utah smelter is the third largest in the U.S.

22.   A government report that new home sales in the U.S. rose in June did little to stem the slump in copper prices, analysts said.

23.   A jump in copper prices, which reversed much of recent declines, boosted shares in mining companies.

24.   A longer-than-expected closure could boost copper prices.

25.   A longer-than-expected closure could have boosted copper prices because the smelter is the third largest in the U.S.

26.   A threatened strike in Canada helped pull nickel and copper prices higher.

27.   Across the Andes, Chile is still growing and would benefit if oil prices remained low and copper prices continued to rise.

28.   But by then the copper price was heading down.

29.   But copper prices have been low in recent months and Chile could opt for the cheapest fighter.

30.   But the debt crisis brought on by costly borrowing and the collapse of world copper prices ultimately thwarted those projects.