OCEAN POLLUTION AND IT`S POLLUTANTS

 INTRODUCTION

The word ocean is derived from the Greek "Okeanos" that means the great stream encircling the earth disc The global ocean covers 71% of the earth`s surface is covered by water.However ocean`s contain 97% of the earth`s water.They remaning 3% is found as water vapour in the atmosphere and water in rivers,glaciers,lakes and ice caps. Since the source of the majority of ocean pollution is land based.

                                              


Ocean pollution can be defined as the introduction of substances to the marine environment directly or indirectly by human activities, resulting in harmful effects such as hazardous to human health, obstruction of marine activities and lowering the quality of sea-water.

MAJOR POLLUTANTS

Ocean pollutants include persistent organic pollutants, endocrine disrupting chemicals, mercury compounds,pesticides,pharmaceuticals,oil,plastic wastes, agricultural wastes, metals and synthetic chemicals. Pollutants may enter the sea through the river`s, atmospheric transport, ocean out falls, ocean- dumping,ships and such marine activities as mining.

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