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ABOUT AUTHOR Raaz Maheshwari*, N S Nathawat  Department of Chemistry, SBRMGC, Nagaur, Rajasthan Department of English, SBDTC, Lakshman Garh, Rajasthan E-mail: drraazgreenchemacs151260@gmail.com ABSTRACT Two of the greatest challenges facing the 21st century involve sustainable supplies of clean water and energy,too highly interrelated resources at affordable cost. Membrane technology is expected to continue owing to energy efficiency. However, there is need ... Read More »