Língua Inglesa - Interpretação de Texto - Fundação para o Vestibular da Universidade Estadual Paulista (VUNESP) - 2013
London School of Hygiene and Tropical Medicines researchers are working to
achieve a safe sewage system for urban centers.
find a way to decompose human waste without filtration.
create new organisms to combat aerobic bacteria.
block the filtration during the sewage contamination.
accelerate the decomposition process in pit latrines.
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