http://thinkprogress.org/election/2015/04/21/3649458/koch-scott-walker-endorsement/
"The governor also embodied the Kochs’ profit-driven goals when he began cutting environmental regulations when he took office, to the benefit of Koch businesses which are known to emit thousands of pounds of toxic pollutants in the state. Walker also quietly worked to allow Kochs’ many Georgia Pacific paper plants to pollute Wisconsin by pouring thousands of pounds of phosphorus into the water."