The Sao Benedito School, powered by solar panels on the roof, sits on the banks of the Tapajos River near Santarem, Para state, Brazil, Friday, Sept. 4, 2026. (AP Photo/Andre Penner)

Arapium Indigenous leader Tiago Silva cools off with water pumped from a well using a solar-powered system in the Nova Sociedade community near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)

Daiana Arapiuns, who is part of the Arapium Indigenous group, sits with relatives holding a box containing a donated solar-power system in the Nova Sociedade community near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)

Ideilde Arapiuns, who is part of the Arapium Indigenous group, holds a box containing a donated solar-power system in the Nova Sociedade community near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)

Men, who are part of the Arapium Indigenous group, carry boxes containing donated solar-power systems in the Nova Sociedade community near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)

Tourist boats sit idle on sandbanks in the Arapiuns River near the Nova Sociedade community near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)

Felipe Arapiuns, who is part of the Arapium Indigenous group, installs a donated solar panel on the roof of his home in the Nova Sociedade community near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)

A man, who is part of the Arapium Indigenous group, stands next to boxes containing donated solar power systems in the Nova Sociedade area near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)