41 Providing educational classes and workshops in the field of water treatment, purification, recycling, desalination, waste water treatment, filtration and conditioning and distribution of training materials in connection therewith; arranging and conducting educational and training classes and workshops in the field of water treatment, purification, recycling, desalination, waste water treatment, filtration and conditioning; organization of educational congresses, and science fairs, field trips, seminars, symposia, workshops, courses, classes, talent programs and summer school classes in the field of water treatment, purification, recycling, desalination, waste water treatment, filtration and conditioning; arranging and conducting educational and training programs in the field of water treatment, purification, recycling, desalination, waste water treatment, filtration and conditioning