1. oxidation
2. reduction
3. magnification
4. hydratic
magnification
1. HCI
2. Photochemical smog
3. SO2
4. Chlorofluoro carbons
Chlorofluoro carbons
1. Bone marrow
2. Liver
3. Lungs
4. Ear
Bone marrow
1. natural geochemical cycles
2. the natural balance of our environment
3. the natural flora of our environment
4. the natural wild life of our region
the natural balance of our environment
1. plastics
2. iron junks
3. detergents
4. glass junks
plastics
1. amount of oxygen taken up by the micro-organisms present in water
2. amount of oxygen released by the micro-organisms present in the water
3. amount of nutrients taken up by the mirco-organisms present in the water
4. None of the above
amount of oxygen taken up by the micro-organisms present in water
1. Developmental activities
2. Tourism
3. Overgrazing
4. Irrigated agriculture
Developmental activities
1. stop the water cycle
2. prevent precipitation
3. make oxygen molecules unavailable to aquatic life
4. make nitrates unavailable to aquatic life
make oxygen molecules unavailable to aquatic life
1. Goitre disease
2. Thyroid disease
3. Dental disease
4. Beri-beri
Dental disease
1. CO2and CO
2. CO,and CO2and SO2
3. CO2,CO,SO2and H2O
4. CO2,CO,H2Sand SO2
CO2,CO,SO2and H2O