GREEN RIVER, Wyo. - July 27, 2009 Four of the United States' five soda ash producers are located above the Wyoming's vast trona reserves, which were formed by an evaporating lake 50 million years ago.

GREEN RIVER - Shortly before his death, U.S. Sen. Craig Thomas once again went to bat for Wyoming soda ash producers, this time intervening on behalf of the industry in a letter to high officials in ...

In April, the Chinese government introduced a 9 percent rebate on its 17 percent value-added tax on soda ash exports. American producers say the action gave Chinese producers an unfair advantage in ...

Four of the United States' five soda ash producers are located above the Wyoming's vast trona reserves, which were formed by an evaporating lake 50 million years ago. Soda ash, or sodium carbonate, ...