- research
alnus rubra
- biomonitoring locate areas prone to ozone pollution, as the leaves react to the presence of high ozone levels by developing red to brown or purple discolorations
- alnus incana
- alnus glutinosa
alnus rubra
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- biomonitoring locate areas prone to ozone pollution, as the leaves react to the presence of high ozone levels by developing red to brown or purple discolorations