Fig. 1: Distribution of household CO compared with WHO guidelines.
From: Chronic household air pollution and exposure patterns among Himalayan nomads
24-h average CO in homes exceeded WHO 8-h CO poisoning guideline of 9 ppm (vertical line) on 100% of household-days. CO was measured continuously in 100 homes, during 44 days, for a total of 4400 total measurement-days.
