Today as the industrial revolution occur the amount of pollution has been increased. In this especially the water and the air pollution can be pointed out as the major problems that occurred currently. The reasons for polluting the water and air can be identified the human activities. Today the industrial areas have been started to dispose all the substances such as oil and sewage and hazardous wastage in to the water without purifying. The ships that navigate in the ocean carry out the same process. Instead of that, in order to balance the ship, the ship use to carry a large amount of sea water and the water will be in an out throughout the voyage. In this process, the conventional species will be died and some will be dispatched in unknown
