| FWPCA | Federal Water Pollution Control Administration |
|---|---|
| HAP | Handicapped Aid Program; Hazardous Air Pollutants [List]; hazardous air pollution; health alliance p... |
| NAPCA | National Air Pollution Control Administration |
| OBS(?) | Organic Brain Syndrome |
| 'Greek letter alpha' | angular acceleration; first [carbon atom next to the carbon atom bearing the active group in organic... |