IMPORTANCE OF WATER FOR LIVING ORGANISMS AND NATIONAL ECONOMY, PHYSICAL AND CHEMICAL METHODS OF WASTEWATER TREATMENT. American Journal of Research in Humanities and Social Sciences, [S. l.], v. 9, p. 7–13, 2023. Disponível em: https://americanjournal.org/index.php/ajrhss/article/view/387. Acesso em: 23 sep. 2025.