Usually, these groups are only there for the view and will try to isolate themselves from the tourists, often taking shelter in the restricted areas, where destruction of the wall covering by a ball thrown on the wall was observed. Since these areas are supposed to be restricted, guards do not patrol them has much, and visitors often go unnoticed. The "Public Park" feel causes also a cleaning problem: imagine twenty thousand people in a small town during a holiday. Archaeologists end up having to do the cleaning work themselves, which is ridiculous.G) Atmospheric Pollution:The bay of Naples has one of the highest concentrations of population in Italy, with factories, cars, and the likes. Like mentioned above, their pollution falls back under the form of acid rain, which greatly affects marble and limestone. But the Pompeian architecture was mostly built with local volcanic material, which is almost unaffected by the acid rain. The problem lies in the painted wall covering, usually high in calcium content; they react like limestone and dissolve.There is also the problem of the proximity of the Naples-Salerne Highway which is next to the site; the pollution from trucks and cars are bad enough, but the constant vibrations from the passing vehicles also weakens the structures. The tourist buses that leave the motor running, sometimes for hours, while waiting for the tourists to come back is also a major problem.H) Restorations:This should not be here, but bad restoration is a cause of damage. Often, temporary conservation attempts have become permanent, and are too weak and not up to the task. Poor-quality wood is often used in an attempt to save money, but it just rots or brakes under the pressure, often damaging what it was suppose to protect in the first place. The delicate task of protecting wall painting was also sometime botched and led to more damage in the end.Section 2: What is or should be done to prevent further damage...
