The outstanding feature of Professor Greenfield's career is his breadth and depth of achievement: In chemical engineering; In biotechnology; In applied economics; In consulting; In teaching; And in pure and applied research.

Many environmental problems (of which waste management and water pollution are excellent examples) involve a complex mix of engineering, science and economics, and Professor Greenfield is thus unusually well qualified to address these issues.

He is internationally respected in this territory. By the standard indicators of performance (publications, successful graduate students, competitive research grants) Professor Greenfield is in the top calibre of academics. He is an active consultant to both industry and government, and an excellent communicator.