分享 Green Renaissance──和 Angela Amazonia Restano 及其他 35 人。
Did you know that lichen can be a sign of good air quality? Small areas with many types of lichen have especially good quality air.<br> Are there many lichen types where you live? Photo: Lichen courtesy of Jim McCulloch/Creative Commons.<br> Via - https://www.facebook.com/USFWSMidwest?ref=stream