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selected him as one of the “100 Chemical Engineers of the Modern Era” for his guidance of the profession into the new century in the area of global climate change, industrial ecology, energy resource assessment, and clean coal technologies. An icon at IIT and a lifelong university benefactor, the IIT Alumni Association awarded him its Professional Achievement Award in 1975, the Alumni Medal in 1995, and the Lifetime Achievement Award (posthumously in 2010). Henry was inducted into the IIT Hall of Fame in 1982. Today, a chemical engineering graduate fellowship bears his name, as does the Henry R. Linden Endowed Professorship.

Although his professional commitments occupied the lion’s share of his time, Henry never lost his inherent love of nature and the desire to be alone among its elements. In the late 1980s, Henry and Natalie, his beloved wife of 42 years, bought a farm in western Wisconsin and drove nearly seven hours to get there on weekends, as time permitted. It was there that Henry enjoyed a respite from his daunting professional commitments. Respite did not mean escape from the values and goals that sustained him through his 87 years, however. Setting aside his more intellectual pursuits, he enjoyed picking up a spade on summer weekends to work the soil and plant a tree, secure in his knowledge of the long-term benefits that can grow from a little extra effort today. But in the cold Wisconsin winter, strapping on his cross country skis for yet another foray up the hills that surrounded the farmhouse, Henry truly came full circle, his boyhood passion for hard work still driving him to mark new trails—in a long life defined by self-set challenges well met.

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