The environmental protection agency (epa) has been tasked with monitoring and regulating air and water quality in the united states since the 1970s. since its creation, air quality has significantly improved: percent change in air quality 1980 vs 2016 1990 vs 2016 2000 vs 2016 2010 vs 2016 carbon monoxide −85 −77 −61 −14 lead −99 −99 −93 −77 nitrogen dioxide (annual) −62 −56 −47 −20 nitrogen dioxide (1-hour) −61 −50 −33 −15 ozone (8-hour) −31 −22 −17 −5 this chart shows the change in levels of air-borne pollutants measured in various places throughout the united states. the negative numbers indicate the percentage of reduction in the measured pollutants. why might the values to the right represent less significant change compared to the values at the left? based on the information in the chart, what argument could be made for reducing regulations regarding air quality?