What’s driving Salt Lake City’s downward emissions trends?

What’s driving Salt Lake City’s downward emissions trends? April 2, 2026 Above: Morning rush hour traffic on Salt Lake City’s 700 East by Hawthorne Elementary School. Photo credit: Brian Maffly Emissions of NOx and carbon monoxide have dropped on the city's streets since 2005, according to new atmospheric sciences research that could help Utah address its air quality problems. Emissions of two major pollutants have steadily decreased on Salt Lake City roads over the past two decades, while...