Figure 2 Trends in Daily Maximum Ozone Levels (image) University of Leicester Share Print E-Mail Caption Figure 2 Trends in daily maximum ozone levels (known as 4MDA8) at urban and non-urban sites. The steepness of the arrows up or down illustrates the size of the trend, with blue being a decrease and red, an increase. Credit University of Leicester Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.