Washington : A new study has utilised a novel method to estimate long-term ozone exposure to quantify the health burden from long-term ozone exposure in three major regions of the world. The research, conducted at the Duke University estimated that 266,000 (confidence interval: 186,000-338,000) premature mortalities across Europe, the USA, and China in 2015 were attributable to long-term exposure to ozone (O3).
Karl Seltzer, study’s lead author said, “Historically, much of the previous research focused on the short-term impacts. We utilized results from the growing body of evidence that links long-term O3 exposure and increased cause-specific premature mortalities, particularly from respiratory diseases.” Interestingly, the team’s observationally-derived data shows smaller human-health impacts when compared to prior modelling results. Explaining this, Seltzer explained that this difference is due to small biases in modelled results. These small biases are subsequently amplified by non-linear exposure-response curves. This highlights the importance of accurately estimating long-term O3 exposure in health impact assessments.