| A | B |
|---|
| Greenhouse Effect | The normal process by which heat is kept in the atmosphere by trapping the warmth of the sun |
| Ozone Layer | Layer of the upper atmosphere where most atmospheric ozone is concentrated |
| Emissions | Substances discharged into the air |
| Exhaust | The escape of steam or gases from an engine |
| Byproduct | Something produced in the making of something else |
| Smog | A mixture of smoke and fog |
| Acid Rain | Rain that is more acidic than normal caused by pollution in the air |
| Pesticide | A chemical intended to kill insects and other organisms that damage crops |
| Irrigation | Supplying water to areas of land to make them suitable for growing crops |
| Surface Water | Water collecting on the ground or in a stream, river, lake, wetland or ocean |
| Groundwater | Water that fills the cracks and pores in underground soil and rock |
| Biodiversity | The number and variety of organisms found within a specified geographic region |
| Nuclear Disaster | When an accidental release of radioactive contamination occurs |
| Radioactivity | Spontaneous emission of radiation as a consequence of a nuclear reaction |
| Fallout | The slow descent of tiny particles of debris in the atmosphere following an explosion |
| Transboundary Pollution | Pollution that starts in one country and crosses boundaries into other countries, generally carried by wind and water |
