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In the early December 2012, Capital Delh...

In the early December 2012, Capital Delhi was in news for smog due to increased air pollution. Smog resulted in reduced visibility and consequent road accidients, traffic jams,and also caused harmful effects to biotic components in the capital.
(i) What is smog? Is it is primarily or secondary pollutant?
(ii) Justify by giving two reasons why is it harmful to human beings.

Text Solution

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(i) Smog is a dark fog formed by condensation of water vapour, dust and smoke particles, and various gasesous pollutants such as oxides of nitrogen, sulphur dioxide etc. in the troposphere. It is a secondary pollutant.
(ii) (a) Smong reduced visibility leading to accidents.
(ii) (b) Smong produces respiratory problems, particularly in young ones and old people.
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Read the given passage and answer the questions that follow. Pollution befouls the air and poisons water. Pollution induces the release of toxicants into the biosphere which makes the air unsuitable for breathing,harms the quality of water and soil, and causes the emission of substances that may cause damagae to humans, plants and animals. To cater to the needs of an increasing population, agriculturre has been intensified through the use of a wide spectrum of fertizilers and pesticides. Diverse industries have been set up to produce chemicals including those that pose a danger to all life forms. Rapid industrialisation has led to deterioration in the quality of air. Widespread use of coal and fossil fuels in industries and petroleum fuel in motor vehicles has aggravated the air pollution problem. Our atmosphere seems to have become a waste basket into which dust, noxious fumes, toxic gases and other pollutants are callously thrown. The intensity of air pollution in Indian cities is increasing primarily due to our vintage vehicles and their poor performance. Water pollution, too has increased with the growth of our pollution and also that of our industries. Water pollution has acquired dangerous dimensions ever since sewage and industrial effluents have started being disposed of into the rivers. Once considered sacred, the rivers are now turning murky and stink.It is sad that almost three-fourths of our fellow citizens have no choice but to drink filthy water. The severely polluted rivers due to mindless dumping of sewage and industrial wastes are a cause for concern not only to us humans but also to myriads of life forms that exist in water. On the French and italian rivieras we can no longer see the sparkling blue waters. The Mediterranean Sea is reported to be turning grey. Rivers and canals pour sewage, detergents and industrial waste into the sea, tankers flush their contents near the river or sea, bottles. rotting garbage and oil slicks are washed into the beaches. The phosphates and nitrates applied to farmlands as inorganic fertilizers, concentrate in lakes and estuaries causing algal blooms due to which wide expanses of water get choked, plants rot, oxygen is used up and fish die. As per the passage, which of these statements in NOT true about air pollution?

Read the given passage and answer the questions that follow. Pollution befouls the air and poisons water. Pollution induces the release of toxicants into the biosphere which makes the air unsuitable for breathing,harms the quality of water and soil, and causes the emission of substances that may cause damagae to humans, plants and animals. To cater to the needs of an increasing population, agriculturre has been intensified through the use of a wide spectrum of fertizilers and pesticides. Diverse industries have been set up to produce chemicals including those that pose a danger to all life forms. Rapid industrialisation has led to deterioration in the quality of air. Widespread use of coal and fossil fuels in industries and petroleum fuel in motor vehicles has aggravated the air pollution problem. Our atmosphere seems to have become a waste basket into which dust, noxious fumes, toxic gases and other pollutants are callously thrown. The intensity of air pollution in Indian cities is increasing primarily due to our vintage vehicles and their poor performance. Water pollution, too has increased with the growth of our pollution and also that of our industries. Water pollution has acquired dangerous dimensions ever since sewage and industrial effluents have started being disposed of into the rivers. Once considered sacred, the rivers are now turning murky and stink.It is sad that almost three-fourths of our fellow citizens have no choice but to drink filthy water. The severely polluted rivers due to mindless dumping of sewage and industrial wastes are a cause for concern not only to us humans but also to myriads of life forms that exist in water. On the French and italian rivieras we can no longer see the sparkling blue waters. The Mediterranean Sea is reported to be turning grey. Rivers and canals pour sewage, detergents and industrial waste into the sea, tankers flush their contents near the river or sea, bottles. rotting garbage and oil slicks are washed into the beaches. The phosphates and nitrates applied to farmlands as inorganic fertilizers, concentrate in lakes and estuaries causing algal blooms due to which wide expanses of water get choked, plants rot, oxygen is used up and fish die. Since when has water pollution acquired dangerous dimensions?

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Read the given passage and answer the questions that follow. Pollution befouls the air and poisons water. Pollution induces the release of toxicants into the biosphere which makes the air unsuitable for breathing,harms the quality of water and soil, and causes the emission of substances that may cause damagae to humans, plants and animals. To cater to the needs of an increasing population, agriculturre has been intensified through the use of a wide spectrum of fertizilers and pesticides. Diverse industries have been set up to produce chemicals including those that pose a danger to all life forms. Rapid industrialisation has led to deterioration in the quality of air. Widespread use of coal and fossil fuels in industries and petroleum fuel in motor vehicles has aggravated the air pollution problem. Our atmosphere seems to have become a waste basket into which dust, noxious fumes, toxic gases and other pollutants are callously thrown. The intensity of air pollution in Indian cities is increasing primarily due to our vintage vehicles and their poor performance. Water pollution, too has increased with the growth of our pollution and also that of our industries. Water pollution has acquired dangerous dimensions ever since sewage and industrial effluents have started being disposed of into the rivers. Once considered sacred, the rivers are now turning murky and stink.It is sad that almost three-fourths of our fellow citizens have no choice but to drink filthy water. The severely polluted rivers due to mindless dumping of sewage and industrial wastes are a cause for concern not only to us humans but also to myriads of life forms that exist in water. On the French and italian rivieras we can no longer see the sparkling blue waters. The Mediterranean Sea is reported to be turning grey. Rivers and canals pour sewage, detergents and industrial waste into the sea, tankers flush their contents near the river or sea, bottles. rotting garbage and oil slicks are washed into the beaches. The phosphates and nitrates applied to farmlands as inorganic fertilizers, concentrate in lakes and estuaries causing algal blooms due to which wide expanses of water get choked, plants rot, oxygen is used up and fish die. Select the most appropriate title for the passage