 | Sistema eléctrico nacional | Term without description | Term without children | Elemento |
| Sistema intermodal de transporte | Term without description | Term without children | Elemento |
| sistema vial | Term without description | Term without children | Elemento |
| Sistemas agroforestales | Term without description | Term without children | Elementos |
| Sistemas biofísicos marinos | Term without description | Term without children | Elemento |
| sistemas de alerta temprana | Term without description | Term without children | Elemento |
| sistemas hídricos | Term without description | Term without children | Elemento |
| sistemas productivos | Term without description | Term without children | Elementos |
| sistemas silvopastoriles | Term without description | Term without children | Elemento |
| sistemas solares termoeléctricos | Term without description | Term without children | Elemento |
| sitio Ramsar | Term without description | Term without children | Elemento |
| sobreexplotación | Term without description | Term without children | Elemento |