Bad air quality on election day is a silent form of voter suppression.
April 15, 2026
Original Paper
Airless Democracy: Air Pollution and Voter Turnout
SSRN · 6576803
The Takeaway
We worry about long lines or voter ID laws, but the literal air we breathe might be the biggest hurdle to democracy. Data shows that even a slight increase in PM2.5 pollution significantly lowers voter turnout. Crucially, it's the most 'politically engaged' people who stay home, likely because they are sensitive to the physical discomfort of polluted air. This means a city’s smog levels can actually flip an election result by discouraging the very people who care most. Our 'right to vote' is apparently dependent on the weather and the local factory's exhaust.
From the abstract
We estimate the effect of daily fluctuations in fine particulate matter (PM2.5) on electoral participation. Using Italian municipality-level data for 32 elections held between 2013 and 2022, matched with new high-resolution environmental data, we show that a 10 μg/m3 increase in PM2.5 lowers turnout by 2-3 percentage points - roughly one million votes. Results are robust to changes of alternative exposure windows, pollutants (PM10 and NO2), WHO-threshold exceedances, and an instrumental-variable