Ecological Risk Assessment (IMAGE) The University of Hong Kong Caption Combining the above findings, the research team conducted a scientific ecological risk assessment. The results indicated that the ecological risk was very high right after the accidental spill in August 2017 (risk quotient (RQ) at all sites >> 1). Fortunately, the ecological risk was substantially reduced after 4 months of the incident (RQ < 1 in four sites; RQ < 2 in the other two sites) Credit @The University of Hong Kong Usage Restrictions Please credit @The University of Hong Kong when using the image. License Licensed content 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.