Azamal Husen served as Professor and Head of the Department of Biology, University of Gondar, Ethiopia and is a Foreign Delegate at Wolaita Sodo University, Wolaita, Ethiopia. Previously, he was a Visiting Faculty of the Forest Research Institute, and the Doon College of Agriculture and Forest at Dehra Dun, India. Husen’s research and teaching experience of 20 years includes biogenic nanomaterial fabrication and application, plant responses to nanomaterials, plant adaptation to harsh environments at the physiological, biochemical, and molecular levels, herbal medicine, and clonal propagation for improvement of tree species. Dr Husen contributed to R&D projects of World Bank, ICAR, ICFRE, JBIC etc. He has >250 publications . He is Series Co-Editor of ‘Plant Biology, Sustainability and Climate Change’, Elsevier. Khwaja Salahuddin Siddiqi graduated as a Master of Science in 1969, a Master of Philosophy in 1971, and a Doctor of Philosophy in 1973 from the Aligarh Muslim University, Aligarh, India. His specialization is inorganic chemistry. He is a former Chairman and Emeritus Professor of the department of chemistry, Aligarh Muslim University, Aligarh, India. He was appointed as a Lecturer in 1974, Reader in 1983, and Professor in 1993. His research interests are coordination chemistry, bioinorganic chemistry, organometallic chemistry, organoborate chemistry, and nanochemistry. Siddiqi has published 190 research papers in different areas of chemistry.