Dispersant Use Comparison (IMAGE) Woods Hole Oceanographic Institution Caption The study model showed that the dispersant injection decreased the overall concentration of all volatile organic chemicals in the atmosphere by a modest amount (about 30 percent). But it also significantly reduced the amount of chemicals most harmful to humans, such as benzene and toluene. The atmospheric concentration of benzene, for example, decreased by about 6,000 times, dramatically improving air quality. Credit Natalie Renier, Woods Hole Oceanographic Institution Usage Restrictions with proper credit 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.