A Wave of Legislation  Beginning in the late 1960s, the conservation movement scored a number of victories with the creation and implementation of a variety of environmental regulations aimed at the protection of wildlife, wild lands, and natural resources. In 1968 the Wild and Scenic Rivers Act was passed, followed two years later by the implementation of the National Environmental Policy Act ("NEPA"), the establishment of the Environmental Protection Agency ("EPA") and the [[National Oceanic and Atmospheric Administration] ("NOAA"), as well as the celebration of the inaugural [[Earth Day]]. The momentum carried on into 1972 when the [[Clean Water Act]], the [[Marine Mammal Protection Act of 1972|Marine Mammal Protection Act]], the [[Coastal Zone Management Act]], and the [[Endangered Species Act]] were passed. Moreover, 1972 saw the banning of DDT by the EPA. The Wilderness Act  On 3 September 1964, [[President Lyndon B. Johnson]] signed the [[Wilderness Act of 1964]] into law. This milestone was achieved by the efforts of environmental conservationists dedicated to the protection of some of the wildest lands in the United States. Chief among these were [[Howard Zahniser]] and [[Olaus Murie]] and [[Mardy Murie]], and Celia Hunter, who dedicated much of their lives and their work to the protection and conservation of wild lands. By 1950 both Zanhiser and Olaus Murie were working for the Wilderness Society, Zahinser as Executive Secretary in Washington DC, and Olaus as President from his ranch in Moose, WY (now home to the Murie Center). From their positions at Wilderness Society, both men continued to work to organize and build broad-based support for the creation and protection of wilderness areas within the United States. Zahniser felt strongly that Congress ought to designate wilderness areas, as opposed to leaving it up to Agency discretion, and, in 1955, began working to convince members of Congress to support a bill that would establish a national wilderness preservation system. Meanwhile, in 1956, Olaus and Mardy Murie embarked upon an expedition to the upper Sheenjek River on the south slope of the Brooks Range in Alaska, which would galvanize them to campaign for the protection of the area as a wildlife refuge. Celia Hunter, with Ginny Wood, founded the Alaska Conservation Society , the first statewide environmentalorganization, in in 1960. Serving on the board, she worked tirelessly to get legislation passed to protect Alaskan wilderness. Celia was also the first female president of the Wilderness Society.