2 eepest known point of the ocean is in the Mariana Trench, 11 kilometres below sea level. But there may be deeper points that we have not seen, as we have only explored five per cent of the ocean to date.
C. The govemment of Canada suggested the idea of World Oceans Day at the Earth Summit in Rio de Janeiro in 1992. In 2008 the United Nations officially recognized the date and it has been growing ever since, from 100 events in 2008 to over a thousand events in more than 120 countries ten years later. The United Nations selected different annual themes for the Day. Nowadays, the day is celebrated in a variety of ways, including special events at aquariums and zoos, beach and river clean-ups, school activities, conservation programmes, art contests and film festivals.D. One of the main aims of the day is to remind people of the vital role the ocean plays in our lives. Life began in the ocean. And the ocean is home to the majority of plants and animals on Earth, from single-cell organisms to the blue whale. Marine plants provide us with 70 per cent of the oxygen we breathe. The ocean controls the climate, providing heat in winter and cool air in summer. It also provides us with food and medicines as well as transport. No matter where you live on the planet, no matter how far from the sea, your life is dependent on the ocean.
E. The most urgent issue with the ocean at the moment is plastic pollution. Reducing one-use
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