The ecological footprint as a comparative instrument of the levels of environmental sustainability in public and private schools in the Municipality of Pombal, Paraíba, Brazil. Research, Society and Development, [S. l.], v. 9, n. 9, p. e419997268, 2020. DOI: 10.33448/rsd-v9i9.7268. Disponível em: https://rsdjournal.org/rsd/article/view/7268. Acesso em: 5 dec. 2025.