Pencemaran udara merupakan satu keadaan yang melibatkan kehadiran sebarang bahan pencemar dalam udara. Keadaan ini boleh menyebabkan kemudaratan dan ketidakselasaan kepada manusia atau organisma hidup yang lain serta merosakkan alam sekitar apabila dibebaskan ke atmosfera. Bahan pencemar udara berasal daripada pelbagai punca.
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| punca bahan pencemar |
Udara yang tercemar boleh mendatangkan penyakit dan ketidakselesaan kepada manusia. Pelbagai langkah boleh dijalankan untuk mencegah dan mengawal pencemaran udara daripada berlaku.
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| punca dan kesan buruk pencemaran udara |
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