That's not always true, some lichens are indeed sensitive to pollutants such as sulphur dioxide and will therefore not grow in highly polluted areas. However some lichens thrive on certain pollutants and therefore will grow very well in highly polluted areas (cities).
LICHENS
Because they are major pollutants that contribute to acid rain.
lichens are sensitive to sulfur dioxide, they are biological indicators. The cleaner the air the more lichens will grow. Therefore if there are houses right by a road, if you look on the roof there would be less lichens as there would be more sulfur dioxide in the air because of pollution. Hope this helps By Troy Flynn
carbon dioxide, carbon monoxide, nitrogen dioxide, acetone, formaldehyde, ...
Carbon Dioxide Sulfur Dioxide Nitrogen Oxides
the answer to this question is pretty simple and it primary pollutants
Lichens are sensitive to Sulphur dioxide and nitric and nitrous oxides as well as ammonia. Pollutants.
Because they are only caused or formed by pollutants that existed before.
LICHENS
Carbon monoxide, nitrogen dioxide, sulphur dioxide, tar, and many other pollutants.
Nitrogen Dioxide
Sulfur dioxide
your nans fanny crack
Lichens need sunlight, water, nutrients from the air including dust and some nutrients from the substrate they grow on they are sensitive to sulfur dioxide there are fluffy lichens, crusty lichens, scaly lichens, leafy lichens etc
tree planting because when we inhale we got oxygen and when we exhale we produces carbon dioxide which the plants needed.
Because they are major pollutants that contribute to acid rain.
Lichens lack an outer impermeable layer that would protect them from pollutants. Various species find it impossible to live in regions with high concentrations of sulphur dioxide or heavy metals. Others actually favour high concentrations of nitrogen in the form of ammonia. Therefore, by looking for the presence of lichens in ecosystems scientists can try to understand which pollutants might be present. They might, for example, expect to find a certain lichen in combination with certain rocks, climate patterns and other plants. If the lichen really was there in the ecosystem then the scientists could conclude that the system was free of a certain pollutant.