The Air Prevention and Control of Pollution Act came into force in

• 1975

• 1981

• 1985

• 1990

With the rise of water temperature, dissolved oxygen

• remains unchanged

• increases in amount

• decreases in amount

• is more available to the aquatic organisms

Kyoto Protocol was endorsed at

• CoP - 3

• CoP - 5

• CoP - 6

• CoP - 4

During sewage treatment, biogases are produced, which include

• methane, hydrogen sulphide and carbon dioxide

• methane, oxygen and hydrogen sulphide

• hydrogen sulphide, methane and sulphur dioxide

• hydrogen sulphide, nitrogen and methane

During waste water treatment, trickling filter  is used for

• primary treatment

• secondary aerobic treatment

• secondary anaerobic treatment

• tertiary treatment

The volume of 'Anatomical Dead Space' air is normally

• 230 mL

• 210 mL

• 190 m

• 150 mL

'Kyoto Protocol' is a multination international treaty for

• phasing out green house gases

• controlling ozone destroying substances

• management of hazardous wastes

• conservation of biodiversity

Phenomenon involving increase in concentration of non-degradable pollutants from lower to higher trophic levels is called

• biomagnification

• bioaccumulation

• biodegradation

• bioinvasion

Relationship between DO and BOD is that they

• are directly proportional

• are inversely proportional

• are not related

• always remain equal to each other

Global warming can be controlled by

• Reducing deforestation, cutting down use of fossil fuel

• Reducing reforestation, increasing the use of fossil fuel

• Increasing deforestation, slowing down the growth of human population

• Increasing deforestation, reducing efficiency of energy usage