Domestic waste will lead to :
1. Biodegradable pollution
2. Nondegradable pollution
3. Thermal pollution of soil
4. Air pollution
If a lake is contaminated with DDT, it's highest concentration would be found in :
1. Primary consumer
2. Secondary consumer
3. Tertiary consumer
4. None of the above.
The ozone layer of the upper atmosphere is being destroyed by :
1. Sulphur dioxide
2. Carbon dioxide
3. Chlorofluorocarbon
4. Smog
Acid rain is due to an increase in the atmospheric concentration of :
1. Ozone, and dust
2. and CO
3. and CO
4 and
Soil erosion can be prevented by :
1. Overgrazing
2. Removal of vegetation
3. Afforestation (Plantation)
4. Increasing bird population
... is not a greenhouse gas :-
1. Hydrogen
2. Carbon dioxide
3. Methane
4. Nitrous oxide or
If water pollution continues at its present rate, it will eventually :
1. Stop the water cycle.
2. Prevent precipitation.
3. Make oxygen molecules unavailable to water plants.
4. Make nitrate molecules unavailable to water plants.
Pollution can be controlled by-
1. Sewage treatment.
2. Checking atomic blasts.
3. Manufacturing electrically operated vehicles.
4. All of the above.
The main air pollutant among the following is :
1. CO
2.
3.
4. Sulphur
The gas that damages the ozone layer is -
1. CFCs
2. CO2
3. CH4
4. SO2