| Subject | English | Spanish |
| environ. | diffuse pollution | contaminación difusa |
| environ. | diffuse pollution Pollution from widespread activities with no one discrete source, e.g. acid rain, pesticides, urban run-off etc. | contaminación difusa |
| environ. | diffuse pollution source | fuente de contaminación difusa |
| environ. | diffuse pollution source | fuente difusa de contaminación |