environmental and economic functions as shown in Table 1.
2.2. Selected Natural Assets in Country's Economy
Every country has different natural resources endowment. In Indonesia, the dominant natural resources which have significant roles in economics are crude petroleum and natural gas. The contributions of these natural assets are accounted almost 15 per cent of Gross Domestic Product of Indonesia. Although in the last few years, their share to GDP has been decreasing, but the share still counted large compare to the other commodities.
2.3. Economic Assets
Economic assets defined as the assets over which ownership rights enforced which provide economic benefits to their owner. In the SNA includes only economic assets within its scope. Economic assets in the SNA are differentiated in two categories, man made assets (produced natural assets) and natural assets (non produced natural assets). In the SEEA, the asset boundary is defined to be much wider that include all natural assets, some may directly participate in production activities, while others may be affected by environmental impact of economicactivities (SNA: 1993, p.513).
Some assets categories in the SNA and the SEEA are identical, such as cultivated assets, work-in progress on cultivated assets (including agricultural crops and livestock), sub soil assets (proven reserves). Some other assets are closely related but have different coverage, for example land in the SNA includes associated water surfaces (lake and river) while in the SEEA the category of water includes water of lake, rivers, coastal water, etc. The category of water in the SNA is mainly restricted to aquifers controlled by human activities. Meanwhile, air natural assets are not included in the SNA, but it is included in the SEEA.
