LAUSR

Unearthed historical sites represent non-renewable resources of significant historical, artistic and scientific value. Historical sites are usually preserved at the place where they were unearthed in order to maintain the original appearance. These sites are exposed to atmospheric processes and are facing serious challenges related to climate change, environmental pollution and human activities. Accordingly, numerous heritage sites were damaged due to improper preservation environment. In China, for example, more than 2000 historical sites disappear every year and their conservation is becoming a serious concern for academia, government and citizens. Emperor Qin’s Mausoleum Site Museum is one of the China’s most famous museums built to preserve the unearthed Terracotta warriors and horses in their funerary pits. The museum attracted more than 100 million visitors (since 1979) and was included in the World Heritage List (1987) by the United Nations Educational, Scientific and Cultural Organization (UNESCO). However, many of the unearthed historical sites are also deteriorated due to ineffective environmental control approach. Creation of a clean and stable preservation environment for the historical site is becoming an urgent issue.