| Code | Name |
|---|---|
| S4010102 | Atmospheric processes |
| S4010103 | Climate & atmosphere studies |
| S4010104 | Weather |
| S4010199 | Other climate and atmosphere studies |
| S4010101 | Atmospheric composition |
| Code | Name |
|---|---|
| S4010201 | Oceanic composition |
| S4010202 | Oceanic processes |
| S4010299 | Other ocean studies |
| Code | Name |
|---|---|
| S4010303 | Groundwater |
| S4010399 | Other water studies |
| S4010305 | Offshore water |
| S4010304 | Inshore water |
| S4010302 | Freshwater |
| S4010301 | Brackish water |
| Code | Name |
|---|---|
| S4010410 | Sparseland |
| S4010499 | Other land studies |
| S4010414 | Wetlands |
| S4010413 | Urban areas |
| S4010412 | Tropical zones |
| S4010411 | Temperate zones |
| S4010409 | Mountainous land |
| S4010407 | High country |
| S4010406 | Grassland |
| S4010405 | Forest and wooded lands |
| S4010404 | Farmland |
| S4010403 | Coastal zones |
| S4010402 | Arid zones |
| S4010401 | Arctic zones |
| S4010408 | Mineral enclaves |
| Code | Name |
|---|---|
| S4010505 | Marine ecosystems |
| S4010599 | Other nature conservation |
| S4010506 | Terrestrial ecosystems |
| S4010504 | Freshwater ecosystems |
| S4010503 | Flora (conservation) |
| S4010502 | Fauna (conservation) |
| S4010501 | Estuarine ecosystems |
| Code | Name |
|---|---|
| S4010601 | Biosafety |
| S4010602 | Education & training |
| S4010603 | Environment - social |
| S4010604 | Environmental hazards |
| S4010605 | Environmental health studies |
| S4010606 | Protected areas |
| S4010607 | Social development |
| S4010699 | Other social environment studies |
| Code | Name |
|---|---|
| S4010701 | River system |
| Name |
|---|
| Other environmental knowledge not elsewhere classified |