Old trees may be our friends, especially on a college
campus. But when the trees are weakened by disease
and age they become a hazard to all. Here is an example
of a removal of two trees on the Penn State Mont Alto
Unlike a forest where the logger can fell a tree with a
chainsaw and yell "Timber!", an arborist needs to take
a tree apart branch by branch to prevent damage to
surrounding buildings and the landscape.