Choose the incorrect statement.
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Ponds look green because lot of algae grow in them.
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Pesticides and weedicides are used for protection of crops and these also cause water pollution.
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A lot of carbon dioxide is used in the process of decomposition and its decreasing level kills aquatic organisms.
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When the algae die, they become food for decomposers.
'A lot of carbon dioxide is used in the process of decomposition and its decreasing level kills aquatic organisms' is an incorrect statement. Phosphorus and nitrogen combined with carbon dioxide are the main supplies that can turn your pond from clean to green very quickly. All aquatic plants and algae make their own energy through photosynthesis which uses sunlight and carbon dioxide to create energy and oxygen as the byproducts. Carbon dioxide released in the process of photosynthesis is used in aerobic decomposition.