More than 650,000 acres of Missouri state land have earned the Sustainable Forestry Initiative certification, the Missouri Department of Conservation announced in a news release. “We are extremely proud to achieve this certification, which means we have outside validation that we are properly managing our forest resources to assure their health and sustainability,” state forester Lisa Allen said in the release. To maintain the certification, the department must undergo annual audits by independent and accredited certification bodies. A full re-certification audit is required every five years.