An interview was undertaken by the researcher with the Barangay Council which comprised the
Barangay Captain and eight Council members. Also present and participated in the meeting was the
Department of Environment and Natural Resources (DENR) Park Supervisor. The interview aimed to
substantiate the answers gathered from the interview schedule of the respondents. The initial part of the
interview focused on the current state of the Subterranean River National Park and its progress in terms
of increase in arrival of visitors in comparison from previous years to present. The impact of
ecotourism in Barangay was further elaborated through discussion in the changes in the area in accord
with establishment and infrastructure development and changes in the perception of people to the
environment. Increase in awareness and involvement of the local people in Sabang was verified and
efforts of the government to increase the said awareness and involvement was confirmed. The next part
of the interview focused specifically on the local people’s assurance of benefits and their role in
attaining sustainable ecotourism in the area. The concept of migration was brought up in the interview
to verify influx of people in Sabang and if the LGU sees this issue as a problem. Moreover, it clarified
if there is an existing scheme to control migration. The last part of the interview was about the
anticipated issues and challenges the LGU are faced with if the Subterranean River National Park will
be included in the Seven Wonders of Nature. Furthermore, it discussed if the LGU considers the
ecotourism in Sabang as sustainable ecotourism. An interview with the Puerto Princesa Subterranean
River National Park Superintendent Mr. James A. Mendoza was also conducted. The main focus of the
interview was a field assessment on the state of the Subterranean River and changes brought by the
existing ecotourism both on city development and the changes in local people. Changes in the local
people were specifically directed in their perception on the environment and increase in awareness and
involvement in environmental protection. Secondary data from Puerto Princesa Subterranean River
National Park (PPSRNP) was used to determine the arrival of visitors from 2000 to 2010[14].