Rock Cleaning Angels 洗石天使

"Once damaged, they can never be recovered."

Volunteers helped clean the graffiti on the rocks with sandpaper along Lei Yue Mun Quarry. However, the graffiti was difficult to remove. This service spread the message of environmental protection and raised students' awareness of the detrimental effects human activities have on the environment, as well as the extent of remedial measures needed to restore the beauty of nature.