Countries involved in the Cuban missile crisis were Cuba, USA and USSR. Their leaders were Fidel Castro of the Cuban Communist government, President John F. Kennedy of the U â¦ SA, and Nikita Khrushchev of the USSR.
Copper. Copper occurs naturally occurring in soil and can also get into your drinking water from copper pipes. Copper enhances the corrosion of aluminum and zinc. Also, water with high copper content may have a bitter taste.
The first plastic pipe to be used was ABS, which is black. Since the 1970s ABS has generally been replaced by white-or cream-color PVC pipe. In rare cases drainpipes are made of copper. Drainpipes must be sloped, usually about 1/4 inch per foot, so water can run freely through them.