James H Clark is Professor of Chemistry and Director of the Green Chemistry Centre of Excellence, The University of York, UK. He has led the green chemistry movement in Europe for the last 15 years and was the first scientific editor of the journal Green Chemistry and is Editor-in-chief of the RSC Green Chemistry book series. Andrew J. Hunt is the Scientific Leader of the alternative solvent technology platform at the Green Chemistry Centre of Excellence, the University of York, UK. His research interests include elemental sustainability, solvents, supercritical fluids, waste utilisation and biorefineries. James Sherwood is a Research Associate at the University of York, UK, where he works at the Green Chemistry Centre of Excellence. In addition to his work on solvent effects in organic synthesis, he is now conducting research on sustainability assessments for bio-based products. Corrado Topi is a Senior Research Fellow at the Stockholm Environment Institute Research Centre at the University of York, UK, where he focuses on sustainability, resilience and change in a context of integrated social, economic and environmental systems. Giulia Paggiola is a Scientist within the Green Chemistry team at GlaxoSmithKline, UK. Prior to this, she was investigating the applicability of green solvents in biocatalysed processes and studied the potential for their uptake in the pharmaceutical industry.