The Environmental Protection Agency (EPA) will stop taking human health into account when calculating the costs and benefits of air pollution. In assessing the impact of regulations on PM2.5 and ozone, the two main forms of pollution, the focus will be on the costs to industry. Previously, the agency calculated the financial benefit to human health from reducing pollution and the costs of implementation. The change in the regulatory impact analysis was published on January 9. The decision stems from uncertainty surrounding the science of the benefits. The EPA document states that historical practices provided a false sense of accuracy and confidence in monetized PM2.5 and ozone impacts than the basic science supports. EPA spokeswoman Carolyn Holran confirmed that the agency will continue to consider these aspects.