The EPA's approval  this summer of two new pathways for generating cellulosic ethanol led directly to the August explosion in cellulosic production and Renewable Identification Number (RIN) generation. September's total is more than all of the previous years combined. WOTUS A group of 24 Republican senators sent a letter yesterday to U.S. EPA regarding the "Waters of the United States" (WOTUS) rulemaking. The letter asks the EPA and the U.S. Army Corps of Engineers to withdraw the rule and work more cooperatively with stakeholders. The senators characterize the process as being "plagued by administrative bias and prejudicial grandstanding." They also cite a social media campaign from the EPA, which has developed a website regarding t...