indoor air pollution

  • Indoor Air Pollution. Statistics 1991 Census — 75% households rely on bio-fuels; Central Pollution Control Board norms for Suspended Particulate Matter (SPM), max:      - 140 µ/m3 annual average    - 200 µg/m3 daily average     Indoor Levels Of Spm During Cooking Year SampleSize NumberofVillages SPM µ/m3 1983 65 4 6800 1987 165 8 3700 …