This bill aims to address greenhouse gas emissions from anesthetic gases used in medical, dental, and veterinary practices in Washington State. It recognizes that while significant efforts have been made to reduce emissions from major greenhouse gases like carbon dioxide and methane, anesthetic gases such as desflurane, isoflurane, sevoflurane, halothane, and nitrous oxide also contribute to greenhouse gas emissions and should not be overlooked. The legislation mandates the Department of Ecology to conduct a study by July 1, 2026, to identify sources, usage, and emission quantities of these gases, and to recommend regulatory measures and strategies for reducing emissions. By January 1, 2027, the department must submit recommendations to the legislature based on the study's findings.

Additionally, the bill requires the Department of Ecology to develop a guidance document by April 1, 2027, aimed at reducing emissions associated with anesthetic gases. This document will be created in consultation with various health and environmental organizations and will consider best practices from other jurisdictions. While the guidance aims to lower emissions, it emphasizes the importance of maintaining patient safety and professional discretion in medical practices. By January 1, 2028, the use of anesthetic gases must align with the guidance document, although no penalties will be imposed for non-compliance. The bill also includes a provision ensuring that if any part of the act is deemed invalid, the remainder will still be effective.