![Ash accumulates each day in classrooms of the primary school of Piquiá de Baixo in northeastern Brazil.](/sites/default/files/multimedia_images_2017/201711ehr_brazil_piquia.jpg)
Ash accumulates each day in classrooms of the primary school of Piquiá de Baixo in northeastern Brazil.
© 2017 Richard Pearshouse / Human Rights Watch
Ash accumulates each day in classrooms of the primary school of Piquiá de Baixo in northeastern Brazil.