Umda osebenzayo:Isetyenziswa kakhulu kumachibi amakhulu, amachibi, indawo, amanzi, ugutyulo lwasezidolophini, ukususa i-eutrophication ye-nitrogen, i-phosphorus kunye ne-cyanobacteria.
Isicelo:I-CNOOC, i-CNPC, i-Sinopec, iiplatifomu zokwemba i-oyile elwandle, ngaphezu kwe-300000 yeetoni ze-oyile elwandle.