A scrubber in the exhaust of a chemical industrial plant removes:
1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometer or above
3. Gases like ozone and methane
4. Particulate matter of the size 2.5 micrometer or less

The zone of atmosphere in which the ozone layer is found
1. Ionosphere
2. Mesosphere
3. Stratosphere
4. Troposphere

A location with luxuriant growth of lichens on the trees indicates that the:

Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
1. Reduced Immune System
2. Damage to eyes
3. Increased liver cancer
4. Increased skin cancer

High value of BOD (Biochemical Oxygen Demand) indicates that:
1. water is highly polluted
2. water is less polluted
3. consumption of organic matter in the water is higher by the microbes
4. water is pure

Rachel Carson's famous book "Silent Spring" is related to :
1. Noise pollution
2. Population explosion
3. Ecosystem management
4. Pesticide pollution

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:
1. Methane
2. Nitrous oxide
3. Ozone
4. Ammonia

Joint Forest Management Concept was introduced in India during:
1. 1990s
2. 1960s
3. 1970s
4. 1980s

Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from
1. sugar industry
2. domestic sewage
3. dairy industry
4. petroleum industry

The highest DDT concentration in aquatic food chain shall occur in
1. Eel
2. phytoplankton
3. seagull
4. crab