Assertion: Till date, no man-made technology has been able to rival the microbial treatment of sewage.
Reason: Untreated sewage is often discharged directly into rivers leading to their pollution and increase in water-borne disease.

The assault on the purity of the environment is the price that we pay for many of the benefits of modern technology. For the advantages of automotive transportation we pay a price in smog-induced diseases, for the powerful effects of new insecticides, we pay a price in dwindling wildlife and disturbances in the relation of living things and their surroundings, for nuclear power, we risk the biological hazards of radiation. By increasing agricultural production with fertilizers, we increase water pollution. The highly developed nations of the world are not only the immediate beneficiaries of the good that technology can do, they are also the first victims of the environmental diseases that technology breeds. In the past, the environmental effects which accompanied technological progress were restricted to a small place and relatively a short time. The new hazards are neither local nor brief. Modern air pollution covers vast areas of continents. Radioactive fallout from nuclear explosions is. worldwide. Radioactive pollutants now on the Earth's surface will be found there for generations, and in the case of Carbon-14, for thousands of years. With reference to the passage, the following assumptions have been made : 1. The widespread use of insecticides has caused ecological imbalance. 2. Conservation of natural flora and fauna is impossible in this age of modern technology Which of the assumptions is/are valid ?

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?

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. Deterioration in the quality of air can be attributed to

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. Which of the following factors is responsible for algal blooms?