an internal ratings system to help customers identify which products are environmentally safe. The Greenlist label is present in many S. C. Johnson & Son products. The Greenlist process has resulted in the elimination of 1.8 million pounds of volatile organic compounds from Windex, and four million pounds of polyvinylidene chloride from Saran Wrap. In 2011, S. C. Johnson & Son settled a lawsuit that alleged the company's Greenlist label misled consumers into believing the products were reviewed by a third party and given a seal of approval. The company agreed to an undisclosed sum and dropped the labeling of Greenlist on Windex. S. C. Johnson & Son is the main sponsor of the Serra das Almas Private Natural Heritage Reserve in the states of Ceará and Piauí, Brazil. The reserve protects an area of the caatinga biome, including wild specimens of the carnauba palm tree (Copernicia prunifera), the source of carnauba wax. On December 18, 2012, S. C. Johnson & Son began operation of two wind turbines at their largest manufacturing facility in Mount Pleasant, Wisconsin. The turbines, in addition to the gas reclamation system in place at a nearby landfill, are estimated to produce enough electricity to completely power the facility. In 2017 S. C. Johnson purchased the ecological product Ecover and Method brands on undisclosed terms. Controversy A RICO lawsuit by tax whistleblower Mike DeGuelle alleges that since 1997, S. C. Johnson & Son has taken advantage of audit errors and filed fraudulent tax returns, underpaying its taxes by millions of dollars. H. Fisk Johnson ordered an inquiry into the allegations, and told Tax Analysts that he learned "other details of the decisions they (the tax department) made that I didn't like. I didn't like what I heard." On December 15, 2011, the United States Court of Appeals for the Seventh Circuit, in Case No. 10-2172, ruled that DeGuelle had alleged a valid claim that the company's discharge of him was part of the tax fraud scheme. DeGuelle's claim was reviewed in the United States District Court for the Eastern District of Wisconsin with the Court ruling to dismiss the RICO lawsuit on the grounds of preclusion. The Court did not rule on SC Johnson's actions as they pertain to tax evasion, with Judge Stadtmueler stating that "the legality of SC Johnson's actions (and whether those actions did, in fact, occur) is of no importance to the