1. nucleus
2. all cell membrane system
3. cell wall
4. membrane system
all cell membrane system
1. Chemical plant accident
2. River pollution
3. Toxic waste dump
4. Man-made bacteria
Toxic waste dump
1. air pollution
2. water pollution
3. noise pollution
4. satiation pollution
water pollution
1. CO
2. Hydrocarbon
3. Flyash
4. SO2
Flyash
1. release of industrial waste mercury into fishing water
2. oil spills into sea
3. accumulation of arsenic in the atmosphere
4. release of human organic wastes into drinking water
release of industrial waste mercury into fishing water
1. radiation hazard
2. automobiles
3. industrial effluents
4. detergents
radiation hazard
1. Pesticide poisoning
2. Soil erosion
3. Nuclear holocaust
4. Global warming
Nuclear holocaust
1. Haemophilia
2. Leukaemia
3. Pneumonia
4. Polio
Leukaemia
1. Cardboard
2. Textiles
3. Plastic
4. Paper
Textiles
1. air only
2. air and soil
3. air, soil and water
4. air and water
air, soil and water