How can we learn from our mistakes during COVID-19? Circular economy in India through Biogas economics. Economic Environment, [S. l.], v. 10, n. 2, p. 59–65, 2021. DOI: 10.36683/2306-1758/2021-2-36/59-65. Disponível em: https://econenv.owebs.ru/article/view/3699. Acesso em: 28 sep. 2026.