Ian Williams is professor of applied environmental science at the University of Southampton where he is the Head of Centre for Environmental Science. A Chartered Waste Manager, he has published two books and ＞130 peer-reviewed papers on waste and environmental issues, as well as ＞100 commercial project reports. Clare Marsden is deputy director for procurement at the Environment Agency. A Chartered Civil Engineer and procurement professional, she champions the use of data to manage business risk.
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