Prof. Rajender Varma (H-Index, 126; Highly Cited Res. 2016, 18, 19, 20, 21, 22; Publons Awardee 2018-19), born in India (Ph.D., Delhi University 1976), is a senior scientist at the U.S. EPA with a visiting position at the RCPTM, Palacky University, Olomouc, Czech Republic. He has over 48 years of multidisciplinary research experience, ranging from eco-friendly synthetic methods using microwaves, ultrasound, etc., to the greener assembly of nanomaterials and sustainable appliances of magnetically retrievable nanocatalysts in benign media. He is a member of the editorial advisory board of several international journals, has published over 925 papers, and has been awarded 17 U.S. patents, as well as 9 books, 26 book chapters, and 3 encyclopedia contributions, with 64,126 citations.