 |
| Subject | English | Spanish |
| environ. | aquifer pollution indicator | indicador de contaminación del acuífero |
| food.ind., sec.sys. | pollution indicator | indicador de contaminación |
| environ. | pollution indicator | indicadores de contaminación |
| environ. | pollution indicator Organisms, mostly plants, which are most sensitive to slight changes in environmental factors. When identified their reaction can serve as an early warning of the endangerment of the health of a community | indicadores de contaminación |