Visiting professor of Environmental Humanism at Yale University.
Formed Overview, headquartered in Washington, D.C., a pioneering international consulting firm devoted to creating a better environment; served as Chairman of the Board, 1969-73.
Co-authored a twice weekly nationally syndicated column “Udall on the Environment.”
Published America’s Natural Treasures: National Nature Monuments and Seashores about America’s national parks, national monuments, and national reserves.
Co-authored The Energy Balloon, a detailed analysis of the nation’s wasteful energy habits and steps needed to correct them.
Became lead lawyer on behalf of a group of Navajo Indians who were some of the earliest uranium miners in the country and were not warned of the dangers they faced from exposure to uranium. He was also on a team of lawyers representing individuals (downwinders) who lived in Nevada, Utah and the Arizona Strip during the days of atmospheric atomic bomb testing . Eventually he represented workers from the Nevada Test Site. These claims continued over the next 12 years and were considered first in the United States courts and finally in Congress.
Began practicing law in Phoenix; filed first claims against the United States government on behalf of 85 Navajo miners and their survivors.
Filed second suit seeking more than $50 million in damages on behalf of former Nevada Test Site workers who were sent into ground zero shortly after a bomb was exploded.
Elected to the Central Arizona Water Conservation Board.
Presented the Ansel Adams Award, the Wilderness Society’s highest conservation award.
Decision in favor of the downwinders was reversed by the appellate court.
Published To the Inland Empire: Coronado and our Spanish Legacy, which retraces the trails of Spanish explorer Francisco Vasquez de Coronado as he searched for the “golden cities” of Cibola in what is now Arizona, New Mexico, Oklahoma and Texas.
Published The Quiet Crisis and the Next Generation, a revised edition with nine new chapters of The Quiet Crisis (1963).
United States Supreme Court declined to review either the miners’ or the downwinders’ cases, ruled the government was protected by sovereign immunity. Having been defeated in the courts, Udall took the radiation cases to the United States Congress for redress.
Relocated to Santa Fe, where he continued to write, lecture, and practice law on a limited basis.
Bestowed knighthood by King Juan Carlos of Spain for his book To the Inland Empire
The Radiation Exposure Act was signed into law by President George H.W. Bush. The act apologized to the victims of uranium sickness and ordered payment of up to $100,000 for miners, ranchers and others exposed to radiation from mining or above-ground testing in the late 1940s through 1960s.
Co-authored Beyond the Mythic West, which examines effects of change upon the inhabitants and land of the western United States.
Published In Coronado’s Footsteps, which examines Francisco Vasquez de Coronado’s exploration and discovery of the Southwest.
Co-authored Arizona, Wild & Free with nephew Randy Udall and the Arizona Game and Fish Department, a look at Arizona’s wilderness areas and habitats.
Awarded United Nations Gold Medal for Lifetime Achievement.
Co-authored text for National Parks of America.
Published The Myths of August: A Personal Exploration of Our Tragic Cold War Affairs with the Atom.
Received the Common Cause Public Service Achievement Award for his lifelong protection of the environment and defense of American citizens who were victims of nuclear weapons testing.