b. Natural Resources Accounting (NRA)
Natural resource accounting is aim to monitor a country's stock and flow of natural resources.
The basic components of NRA are:
(1) Stock at the beginning period
(2) Increasing stock due to upward adjusted estimates for known reserves, discovery of new resources, natural increases due to reproduction, and initial stock (stumpage for words) increase due to resources development (e.g., dams)
(3) Reduction due to downward adjusted estimated for reserves, natural depletion, depletion due to withdrawal for economic activities and depletion for other causes
(4) Stock at the end of period.
