Some copper and zinc smelters have been forced to cut their output because they have run out of space to store hazardous sulphuric acid in the face of poor demand for the by-product and more may have ...

A solution with a pH value which is less than 7 is acidic. The acids which react with metals usually have quite a low pH, of either 3 or less. Some metals react with acids and when they do the ...

Tourism promoters charge people $2 apiece to look at the most notoriously polluted mining site in Montana, an old copper pit filled with toxic water that will likely never be cleaned up. The Berkeley ...