Need Two Years, To Clean Dust Merapi in Borobudur Temple

Cleaning Mount Merapi volcanic ash at Borobudur Magelang regency, Central Java, has yet to complete and it took two years. Cleaning the outside of the initial extent and have not touched the inside of the stone structure of the temple.Volcanic ash was still in the crevices of the wall drainage or waterways and the stupa of the temple. If left unchecked, sulfur-containing volcanic ash has the