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प्रश्न
What is eutrophication?
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उत्तर
It is the process of oxygen depletion in water bodies, occurring either naturally or as a result of human activities. Eutrophication occurs due to the introduction of nutrients and chemicals through the discharge of domestic sewage, industrial effluents, and fertilizers from agricultural fields. Algae and phytoplankton use carbon dioxide, inorganic nitrogen, and phosphate from the water as food. This causes the death of most aquatic organisms by depleting the water of its oxygen.
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संबंधित प्रश्न
Mention any two sources of wastes.
Every household produces a lot of material A daily. In one of the methods of disposal B, material A is burned at a very high temperature of about 1000°C in a structure called C. During this process, the organic matter present is removed as D and E whereas F is left behind (which can be dumped in a landfill site).
(a) What is material A?
(b) Name the method of disposal B.
(c) What is structure C known as?
(d) What are (i) D (ii) E, and (iii) F?
(e) This method is especially suitable for the disposal of materials produced by certain institutions. Name such institutions.
What can an individual do to reduce waste at home?
What is known as waste?
What is meant by domestic waste?
Study the image below and write down three items you have at home in each category of waste.
Biodegradable ______
What are the sources of solid wastes? How are solid wastes managed?
The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as ____________.
How does recycling help reduce pollution?
Provide a suitable term that expresses the meaning of the following statement.
Contents of the waste bins.
