Salt Lake's light rail trains are air quality sleuths

(University of Utah) The TRAX project is the only known transit-based mobile air quality network in North America. Some results are unsurprising, such as spikes of carbon dioxide and nitrogen dioxide, byproducts of gasoline combustion, at street intersections. But the sensors also found methane emissions patterns that didn't correlate to daytime working hours, suggesting possible fugitive methane leaks.
Source: EurekAlert! - Social and Behavioral Science - Category: International Medicine & Public Health Source Type: news