Conference Agenda
Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
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Daily Overview |
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Air pollution 4 Location: Auditorium N: Agnar Sandmo Session Chair: Shreekant Gupta, University of Delhi | |
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Mind the PM2.5 Gap! Comparing Exposure Data from Wearable Sensors and Ambient Monitors 1: Heidelberg University, Germany; 2: Heidelberg Center for the Environment Biases in pollution exposure estimates from conventional data sources could threaten the validity of existing health impact assessments and corresponding monetary damage estimates. To shed light on this, I construct a novel PM2.5 pollution dataset using over 45 million personal exposure readings collected by 594 consumer adopters of wearable air quality sensors in the United States. I then test for the existence and nature of a PM2.5 exposure gap between personal measurements and commonly-employed secondary data from ambient monitors. On average, personal exposure is between 7% and 18% less than monitor data suggests, while median differences correspond to nearly 40% less pollution. Moreover, my analysis reveals correlations between this PM2.5 gap and pollution levels, location, and temporal factors. Accounting for these discrepancies in the future would recalibrate existing damage functions and previous estimates of environmental policy benefits. | |