Transportation pollution is one of the leading air pollutants


By Julia Shanahan | October 25th, 2019

According to an Oct. 10 report from the New York Times, greenhouse emissions in the Des Moines metro area have increased 85 percent since 1990 and 20 percent per capita.

In 2017, transportation was the largest source of greenhouse emissions, topping industry and agriculture. Passenger vehicles made up a large majority of the emissions. Greenhouse gas emissions have increased in almost every metropolitan area nationwide, with New York a leading city, the report says.

Iowa is often scrutinized for its role in contributing to climate change due to Iowa farmers’ farming practices. Jerry Schnoor, professor of civil and environmental engineering at the University of Iowa, told the Des Moines Register that along with Des Moines’ growing population, greenhouse gas emissions can also be attributed to surrounding suburbs expanding into what was once rural farmland, therefore increasing Iowa’s carbon footprint. He also called for regulations on large freight vehicles, saying there should be improved average fleet-mile efficiency.

In 2018, the total number of licensed drivers in Polk County was 347,472, an approximate 100,000-person increase since 2008. In Iowa, 15 percent of all greenhouse gas emissions comes from transportation pollution, with agriculture accounting for a majority of Iowa air pollution with 30 percent.

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