San Francisco airport will monitor plane waste for COVID-19 variants
The program is the first in the country to continuously monitor sewage from airplanes
![A wide shot photo of San Francisco International Airport with planes at several gates and runways visible in the distance.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/05/050923_bl_airport_wastewater_treatment_feat.jpg?fit=1030%2C580&ssl=1)
San Francisco International Airport (shown) will be the first U.S. airport to regularly test plane sewage for coronavirus variants.
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