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| Subject | English | Norwegian Bokmål |
| environ. | clean air area Areas where significant reductions in ozone forming pollutants have been achieved through industrial initiatives to control and/or prevent pollution, through implementation of transportation improvement plans, national efforts to reduce automobile tailpipe emissions and lower the volatility (evaporation rate) of gasoline | område med ren luft |
| environ. | clean air car Vehicles that function without emitting pollutants in the atmosphere | miljøvennlig bil |