Foxconn was also exempted by Governor Scott Walker from filing an environmental impact statement, prompting criticism from environmentalists. The plant was estimated to contribute significantly to air pollution in the region. Environmentalists criticised the decision to allow Foxconn to draw of water per day from Lake Michigan. Given water concerns, Foxconn is spending $30 million on zero liquid discharge technology. 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.