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Question
Read the following statements and select the incorrect statement related to marine pollution.
Read the following statements and select the incorrect statement related to marine pollution.
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Solution
The correct option is C Oil drilling and shipwrecks increase the dissolution of oxygen in water
Pollution of sea or ocean water due to the discharge of wastes into it is called marine pollution.
Oceans are the ultimate sink of all natural and man-made pollutants.
Rivers discharge their pollutants into the sea.
The sewage (wastewater) and garbage of coastal cities are also dumped into the sea. Finally, from the sea it reaches into the oceans.
One of the major threats to the oceans and seas is oil drilling (process of extraction of the oil) and shipwrecks (accident in which a ship is destroyed or sunk at sea) which often lead to oil spills/slicks.
Oil spill is an accidental discharge of petroleum onto the surface of oceans. Oil is immiscible in water; it floats above the water surface. This prevents the dissolution of oxygen in water and the marine life dies of oxygen insufficiency. It is a serious threat to coral reefs and biodiversity.
Plastics are non-biodegradable, the majority of plastic made till now lies somewhere on the planet. The largest dump site of this pollutant is the ocean.
Plastics can break into smaller pieces called microplastics. These have higher surface area, allowing toxic chemicals (polychlorinated biphenyls - PCBs) to accumulate on their surface.
Figure: Marine pollution
Hence, option c has the incorrect statement.
Pollution of sea or ocean water due to the discharge of wastes into it is called marine pollution.
Oceans are the ultimate sink of all natural and man-made pollutants.
Rivers discharge their pollutants into the sea.
The sewage (wastewater) and garbage of coastal cities are also dumped into the sea. Finally, from the sea it reaches into the oceans.
One of the major threats to the oceans and seas is oil drilling (process of extraction of the oil) and shipwrecks (accident in which a ship is destroyed or sunk at sea) which often lead to oil spills/slicks.
Oil spill is an accidental discharge of petroleum onto the surface of oceans. Oil is immiscible in water; it floats above the water surface. This prevents the dissolution of oxygen in water and the marine life dies of oxygen insufficiency. It is a serious threat to coral reefs and biodiversity.
Plastics are non-biodegradable, the majority of plastic made till now lies somewhere on the planet. The largest dump site of this pollutant is the ocean.
Plastics can break into smaller pieces called microplastics. These have higher surface area, allowing toxic chemicals (polychlorinated biphenyls - PCBs) to accumulate on their surface.
Figure: Marine pollutionHence, option c has the incorrect statement.
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