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California4jx
- Master | Next Rank: 500 Posts
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ITS D.
The whole question is to determine how Sulphur dioxide impacts the growth of plants.
If the traffic makes deposits inturn reduces the light . Well light is essential for plant growth. So the whole purpose of the experiment is lost . We are interested in checking whether Sulphur dioxide in Urban area is responsible for reduced Plant growth .
Hope this is helpful.












