More specific terms
- NT GEOGRAPHY
- NT CARTOGRAPHY
- NT FORMAS FISIOGRAFICAS Y ECOSISTEMAS
- NT RESOURCES (GENERAL)
- NT ENVIRONMENT
- NT POLLUTION
- NT WATER
- NT TIERRAS, RECURSOS VEGETALES Y SUELOS
- NT FAUNA SILVESTRE
- NT MARINE RESOURCES
- NT MINERAL RESOURCES
- NT ENERGY RESOURCES