While Americans remain unfamiliar with fuki, Japanese farmers grow vast amounts of the vegetable (also known as sweet coltsfoot or giant butterbur) for their rhubarb-like stalks. Another colony-former, fuki grows where few other vegetables will---in wet, dark places. The leaves grow quite large, and the entire plant takes up a good deal of room, growing 3 to 6 feet high and wide. After harvesting the stalks, cut them into 6-inch pieces, blanch to loosen the outer skin, then peel.
Summary Acid mine drainage (AMD) refers to the outflow of acidic water from a mining site. In most cases, this acid comes primarily from oxidation of iron sulfide (FeS2, also known as pyrite or fool's gold), which is often found in conjunction with valuable metals.
The technique is an acid heap leaching process like that of the copper method in that it uses sulfuric acid instead of cyanide solution to liquefy the target minerals from crushed ore. The process has been urbanized by European Nickel PLC for the rock laterite deposits of Turkey and the Balkans.