Early autumn

Name(s): 
Sickness in trees
Nature 
Early autumn, when trees change colour earlier than normal, is a classic sign of sickness in trees. Another sign is bare or sparsely foliated treetops. Early autumn can also be a result of drought conditions, pests or diseases affecting trees. However, pollution and the effect of ozone depletion are increasingly being considered the cause of repeated early autumns.
Value(s) 
Type 
(J) Problems under consideration