That analysis found that 1 in 28,000 people, or 36 in 1 million, could develop cancer from lifetime exposure to air toxics from outdoor sources.
Outdoor sources can be the main contributors to indoor concentrations of some contaminants.
We quantified the relative contributions to PM2.5 from both secondhand smoke and infiltrating outdoor sources in US casinos.
The results of the study show there were greater masses of PM10 and PM2.5 indoors that controlled by outdoor sources.
Emissions from seven outdoor sources penetrated easily indoors being responsible for the remaining 53% of measured PM2.5 indoors.
It is unknown what the impact of these soiling events is, and whether in some cases they are wrongly attributed to outdoor sources.
Fine PM such as DPM originate from outdoor sources, and the events that can cause a drop or a sudden increase in its concentration are rare.
Results indicate that indoor elemental carbon concentrations are dominated by indoor sources during biomass burning, and outdoor sources at all other times.
The accident occurred at 08 03, and was caused by there being virtually no light to see with, since all outdoor sources of light were covered.
Dioxins were assumed to have outdoor sources only.
Of these, benzene had the greatest contributions from outdoor sources.
