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Question
Classify the following pollutions into natural and man-made categories.
Sewage, dust, pollen grains, chemical fertilizers, vehicular smoke, algae, pesticides, waste of animals and birds.
Chart
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Solution
| Pollutant | Category |
| Sewage | Man-made |
| Dust | Natural |
| Pollen grains | Natural |
| Chemical fertilizers | Man-made |
| Vehicular smoke | Man-made |
| Algae | Natural |
| Pesticides | Man-made |
| Waste of animal and plants | Natural |
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