---
title: S
description: Find sustainability terms and eco insights with ecoinvent.org's LCA glossary. Find everything under 'S'.
---

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# S

[Salt Water](https://support.ecoinvent.org/glossary-s#S-Salt-Water)

[Service](https://support.ecoinvent.org/glossary-s#S-Service)

[Shallow Groundwater](https://support.ecoinvent.org/glossary-s#S-Shallow-Groundwater)

[SPOLD](https://support.ecoinvent.org/glossary-s#S-SPOLD)

[Supply Mix](https://support.ecoinvent.org/glossary-s#S-Supply-Mix)

[Surface Water](https://support.ecoinvent.org/glossary-s#S-Surface-Water)

[System Model](https://support.ecoinvent.org/glossary-s#S-System-Model)

### Salt Water

Water having high concentration of salts.

### Service

A product without a mass.

### Shallow Groundwater

Groundwater that is located less than three meters deep.

### SPOLD

Abbreviation for Society for the Promotion of Lifecycle Development

### Supply Mix

A production mix with the addition of the import of the specified product to the geographical area.

### Surface Water 

Fresh water you can see as overland flow, rivers, and lakes excluding sea water. A distinction is not made between lake and river water.

### System Model 

A model describing how activity datasets are linked to form product systems. A system model may determine factors such as whether to use allocation (and which type of allocation) or substitution to handle the multi-functionality problem, or whether to use average or marginal suppliers. It may also affect how by-product treatments are assessed.

Synonym (input-output economics): Technology model.

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