He is the recipient of many prizes and awards, including 25 honorary degrees, a MacArthur Fellowship, the 1987 United Nations' Environment Prize, the 1989 World Wide Fund for Nature Gold Medal, and the 1994 Blue Planet Prize for his "exceptional contributions to solving global environmental problems." More recently, he was awarded the Presidential Medal of Italy, the Borgström Prize by the Royal Swedish Academy of Agriculture and Forestry, and appointed an honorary professor of the Chinese Academy of Sciences. In 1991, the American Humanist Association named Brown the Humanist of the Year.