| Wetlands may overlie important groundwater aquifers, especially on moraines, eskers, and fluvioglacial deposits. |
| Dissimilatory metal-reducing bacteria, which are ubiquitous in soils and aquifers, couple. |
| Shortages have become endemic to many regions, as record drought and population sprawl sap rivers and aquifers. |
| The potable nature of available drinking water is affected as the sweet water aquifers are destroyed by quarrying. |
| At particular risk are aquifers, underground repositories of water that are tapped by wells for agricultural irrigation and drinking water. |
| Deep down within fluids or aquifers volatilization is not an important transport process. |
