Businesses support clean air and water as much as anyone, and recognize the need for sensible environmental regulations. Regulators must recognize, however, that regulatory requirements come with a cost that can be substantial. Regulations should therefore be based upon sound peer-reviewed science, and an evaluation of the cost to businesses and consumers in relation to any benefit to determine whether the regulation is appropriate. Specifically, any Wisconsin-based environmental regulation should be subject to an external, scientific peer review process to ensure it is based on sound science.