Around 77 per cent of marine pollution comes from the land. Substances are getting washed into rivers and the ocean, increasing nutrient levels and causing algae and seaweeds, which compete with other plants and animals for space and food, to grow. Pesticides seep into the water system, where their poisonous chemicals kill organisms. In some parts of the world, forest clearance is a source for marine pollution. When loggers and developers cut forests they expose soils. Wind and rain wash these soils into rivers and eventually out to the oceans. Sediment builds up in coastal areas, destroying habitat and smothering wildlife. Manufacturing, transporting goods and people, heating, and cooking can all be involved in burning fossil fuels. These give off carbon dioxide, one of the gases that many scientists believe is changing the world' s climate. One of the likely effects of global warming is that as the planet heats up, the polar ice caps will melt, causing sea levels to rise.
So how will the future look like? Will the sea levels rise?
About 6 million tons salt are won annually from the sea. Thus one could copy the Egyptian Cheopspyramide.
