All State agencies, except where existing law expressly prohibits, shall identify, develop, and adopt methods and procedures that will assure that: Environmental amenities and values are given appropriate consideration in planning and decision-making along with economic and technical considerations; Studies are undertaken to develop and describe appropriate alternatives to present policies, programs, and procedures that involve significant adverse environmental effects or unresolved conflicts concerning uses of available resources; and Planning and decision-making involving environmental effects are undertaken with the fullest practicable provision of timely public information and understanding and in coordination with public and private organizations and individuals with jurisdiction by law, special expertise, or recognized interest.