The Department of Environment and Natural Resources (DENR) will be cracking the whip in Palawan, particularly in the Subterranean River National Park in Puerto Princesa City and El Nido, according to officials.
The DENR has added Palawan to Panglao Island in Bohol and Boracay where it is going after establishments violating clean water and easement laws.
Environment Secretary Roy Cimatu said on Tuesday the DENR could not afford to have another problem similar to that of Boracay.
Last week, President Duterte called Boracay a “cesspool” and threatened to close it down in six months if the sewage and garbage problems were not solved.
Speaking at the opening of the 2nd Philippine Environment Summit in Cebu City, Cimatu cited the condition of the Subterranean River National Park in Puerto Princesa, a Unesco World Heritage Site and one of the New 7 Wonders of Nature.
Considered the longest navigable underground river in the world, it flows directly underneath St. Paul Mountain Range, passing through caves and rock formations.
Cimatu told reporters that the ceiling of the caves had darkened, which might be caused by too many people passing through.