Foxconn was also exempted by Governor Scott Walker from filing an environmental impact statement, prompting criticism from environmentalists.[81] The plant was estimated to contribute significantly to air pollution in the region.[82] Environmentalists criticised the decision to allow Foxconn to draw 26,000 cubic metres (7×10^6 US gal) of water per day from Lake Michigan.[3] Given water concerns, Foxconn is spending $30 million on zero liquid discharge technology.[83] Foxconn is also required to replace wetlands at a higher ratio than other companies; Foxconn must restore 2 acres of wetland for every 1 acre disturbed instead of the ratio of 1.2 to 1 for other companies.[83]