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Observe the leaves of trees, shrubs or bushes planted by the roadside. Note whether their leaves have some dust or soot deposited over them. Take similar observations with the leaves of trees in the school compound or in a garden.
Is there any difference in deposition of soot on leaves of trees near the roadside?
What could be the possible reasons for this?
If the plants or trees are on the roadside or any windy places, then the . If it is kept in closed places, then the range of dust will be . This is because in a crowded city, emitted by the get deposited on the leaves of plants or trees on the roadside.
Take a map of your city or town and try to identify regions in the map where you have noticed very thick layer of soot on the plants by the roadside. Compare with results obtained by other classmates and mark these areas on the map. Perhaps the results from all the students could be summarised and reported in newspapers.
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