Ph.D., Sanitary Engineering, 1952
Joseph Ling, who was born in Beijing, earned a bachelor of science in engineering from Hangchow Christian University in Shanghai. He arrived in the U.S. in 1948 and enrolled at the University of Minnesota. Ling received a master of science in engineering and a doctorate in sanitary engineering in 1952. He later went on to a long and distinguished career as an environmental engineer and later vice president at 3M where he pioneered the “Pollution Prevention Pays” program in 1975, a program still in place today aimed at preventing pollution at the source rather than removing it after it has been created.
Among numerous awards, Ling was nominated by U.S. President Richard Nixon to be a member of the Consulting Committee of the Air Quality and he was elected to the U.S. National Academy of Engineering in 1976.
Photo Source: Weiming Lu
林作砥，出生于北京，在上海接受大学教育，获工程学士学位。1948年林作砥赴美，获明尼苏达大学工程科学硕士；1952年获得明大卫生工程博士学位。林作砥被工程界尊称为“污染防治先生”，他首创的“3P”（Pollution Prevention Pays） “防治污染的报酬”计划，鼓励工业废弃物回收再利用的观念，使科技和工业产品以追求零污染为目标，不但成为美国的国家环保政策，也广泛的被欧美各国引用。
林作砥一生获奖无数，1974年被尼克松总统任命为“空气品质顾问委员会”委员，1976年荣膺美国国家工程学院院士。