Question

7. How do lichens help scientists in assessing the
effects of air pollution?
how can you tell me​

Answer 1

Answer:

Lichens and Air Pollution

Scientists have found that green and bushy lichen survive only in clean air, so the presence of many green and bushy lichens in a given environment indicates that the air is clean

Explanation:

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Answer 2

Answer:

Scientists have found out that the green and bushy lichen can survive only in clean air, so the presence of many green and bushy lichens in a given environment indicates that the air is clean.

Explanation:

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