Question

did you find some plants growing on the tree? (you can touch the bark and look for a green velvety growth for this )​

Answer 1

Answer:

The “green fungus” on a tree is usually a foliose or crustose lichen, often the genus Flavoparmelia. Again, harmless to the tree, although it's been argued only an ailing tree grows bark slow enough to accommodate lichens. The leafier lichen forms are often indicators of good air quality.

Explanation: