As a leading environmental professional and consultant since the 1940s, Kenneth M. Mackenthun offers a unique perspective on the breadth, scope, and ever-constant change in environmental legislation at the federal, state, and local levels and what those guidelines signify. He covers regulations pertaining to air, land, and water resources and examines the fundamentals of environmental legislation, including U.S. codes, public laws, and regulations. He presents methods for conducting environmental assessments, offers guidance on writing environmental impact statements, and focuses on issues related to toxic/hazardous materials and waste.