San Miguel Corp., along with the Department of Environment and Natural Resources and the local government of Navotas City, taps more volunteers from its own workforce to scale up efforts to clean and protect Isla Pulo, home to the remaining old-growth mangrove forest in Metro Manila. The company, which has been holding weekly cleanup activities since October, mobilized some 80 volunteers consisting of employees, residents from Barangay Tanza 1 and personnel from the local government of Navotas, Philippine National Police personnel based in Navotas, the 51st Engineers Brigade of the Philippine Army and the DEBR. Volunteers collected 3,803 sacks of garbage from the mangrove area, which also serves as a natural barrier that protects nearby cities from storm surges and coastline erosion.