(70 ILCS 605/4-15.1) (from Ch. 42, par. 4-15.1)
    Sec. 4-15.1. Protection of environmental values. In performing any of the duties and in exercising any of the powers provided in this Code, the commissioners shall use all practicable means and measures, including consideration of alternative methods of providing the necessary drainage, to protect such environmental values as trees and fish and wildlife habitat, and to avoid erosion and pollution of the land, water or air.
(Source: P.A. 86-297.)