What happened to the Palawan Rainforest according to the third paragraph?

A、 It is considered to be the last ecological frontier in the archipelago nation.
B、 Palawan grows about 5,500 hectares of rainforest every year.
C、 It is used as agricultural and residential land, commercial land, and has suffered from illegal logging, burning and forest fires.
D、 18 illegal loggers had been killed.