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Karnataka Board PUCPUC Science 2nd PUC Class 12

Discuss Briefly Defunct Ships and E-wastes - Biology

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Question

Discuss briefly Defunct ships and e-wastes

Solution 1

Defunct ships & e-wastes – The dismantling of defunct ship is a technically complex process, which is potentially harmful to the environment & human health. Defunct i ships contain toxicants like asbestos, mercury, etc. The workers breaking the ships are not suitably protected and are exposed to toxic chemicals. The coastal areas in the vicinity of the ship-breaking yard also becomes polluted. At the international level, it is accepted that there is uncertainty about the relevant controls for the dismantling of such vessels & there is an urgent need to establish a specific enforceable control framework.
Electronic waste comprised of irrepairable computer and other electronic goods, generated by developed countries.
It is valuable source of secondary raw materials, if treated properly, however if not treated properly it is the major source of toxins. Eventually recycling is the only solution for the treatment of e-wastes provided it is carried out in an environment friendly manner.

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Solution 2

Defunct ships and e-wastes: - Defunct ships are dead ships that are no longer in use. Such ships are broken down for scrap metal in countries such as India and Pakistan. These ships are a source of various toxicants such as asbestos, lead, mercury etc. Thus, they contribute to solid wastes that are hazardous to health.

E-wastes or electronic wastes generally include electronic goods such as computers etc. Such wastes are rich in metals such as copper, iron, silicon, gold etc. These metals are highly toxic and pose serious health hazards. People of developing countries are involved in the recycling process of these metals and therefore, get exposed to toxic substances present in these wastes.

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Chapter 16: Environmental Issues - Exercises [Page 286]

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NCERT Biology [English] Class 12
Chapter 16 Environmental Issues
Exercises | Q 9.2 | Page 286

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