In 2005, US government Department of Labor increased the allowable worker exposure to diesel exhaust fume in thousands of mines. The move, which weakens a 2001 Mine Safety and Health Administration (MSHA) standard for non-coal mines, has angered USW, the union representing miners in the metal, mineral and stone sectors. ‘Diesel fumes cause cancer and lung disease,’ said USW president Leo Gerard.

Confined Space, 7 June 2005. Risks 210,.