Marine pollution is an additional source of environmental stress that can hinder the recovery of injured species. In order to reduce pollutants entering Prince William Sound and the Gulf of Alaska, the Trustee Council funded the development of comprehensive plans to stop marine pollution at its source for communities in the Sound, Kodiak Borough, and lower Cook Inlet. They subsequently funded implementation of the plan with construction of "environmental operating stations" in Cordova, Valdez, Tatitlek, Chenega Bay, and Whittier. Staged implementation of similar projects has occurred in Kodiak Island communities. These waste management programs are designed to reduce chronic sources of marine pollution by providing facilities and services to properly dispose of used oil, household hazardous waste, and scrap metals.