Nitrate Influx and Sulfate Flux Compared With NOx and SOx Emissions From Neighboring Countries (image) Hokkaido University Share Print E-Mail Caption Nitrate influx did not reflect the decreasing trend of NOx emissions (left) while sulfate flux well correlated with the decreasing SOx emissions (right) from neighboring countries. Credit Hokkaido University Usage Restrictions These images are copyrighted and can be used for reporting this press release if appropriately credited. 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.