1. noise pollution
2. soil pollution
3. water pollution
4. air pollution
air pollution
1. SO2
2. CO2
3. NO2
4. SO3
SO2
1. 50%
2. 70%
3. 80%
4. 100%
80\%
1. killing of intestinal bacteria
2. upsetting enzyme production
3. converting nitrates into nitrites which harms haemoglobin leading to anaemia
4. producing more amino acids
converting nitrates into nitrites which harms haemoglobin leading to anaemia
1. Lead
2. CFCs
3. Abestos
4. DDT
Abestos
1. of food scarcity
2. of game lovers
3. of exessive use of poisoned pesticides
4. very few dead animals are found in the fields
of exessive use of poisoned pesticides
1. CO
2. SO2
3. Ozone
4. NO2
Ozone
1. Sea
2. Air
3. Jet aeroplane emission
4. Soil
Jet aeroplane emission
1. it has no residual germicidal effect
2. it is not effective against most micro-organisms
3. colour and turbidity of water reduces its disinfection potential
4. Both (1) and (3)
it is not effective against most micro-organisms
1. CO2
2. Insecticide
3. Plastic
4. Both (2) and (3)
Both (2) and (3)