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  4. Lichens indicate SO2 pollution because they

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Q. Lichens indicate SO2 pollution because they

AIPMTAIPMT 1989Biological Classification

Solution:

Lichens are found in Artie Tundra region where no other plant can grow. Lichens prefer to grow in pollution free environment. They are often used as a indicator of pollution and also they are very sensitive to S02. They are first to die in a polluted environment (more SO,).