Construction workers examine materials in Belem, Brazil, Sept. 24, 2024, at the site of a project being built for the COP30 U.N. Climate Summit. (AP Photo/Paulo Santos)

A boat goes down a tributary of the Tucunduba River in Belem, Brazil, Sept. 23, 2024. (AP Photo/Paulo Santos)

FILE - Boats are anchored at dawn at the Ver o Peso market that is hosting the Acai Fair in Belem, Brazil, Aug. 7, 2023. (AP Photo/Eraldo Peres, File)

Herons land on trash in a tributary of the Tucunduba River in Belem, Brazil, Sept. 23, 2024 (AP Photo/Paulo Santos)

Construction workers make progress in Belem, Brazil, Sept. 24, 2024, on a project for the COP30 U.N. Climate Summit. (AP Photo/Paulo Santos)

Paraguassu Eleres, whose property sits along the Tucunduba River, poses for a photo Sept. 24, 2024, in Belem, Brazil. (AP Photo/Paulo Santos)

A refrigerator floats in a tributary of the Tucunduba River in Belem, Brazil, Sept. 24, 2024. (AP Photo/Paulo Santos)

Construction workers walk around Parque da Cidade, or City Park, in Belem, Brazil, Sept. 24, 2024, a project being built for the COP30 U.N. Climate Summit. (AP Photo/Paulo Santos)

A man steers his boat on the Aura River in Belem, Brazil, Sept. 24, 2024. (AP Photo/Paulo Santos)

People walk along the Jacare Canal in Belem, Brazil, Sept. 23, 2024. (AP Photo/Paulo Santos)

The Tucunduba River flows along the Federal University of Para in Belem, Brazil, Sept. 27, 2024. (AP Photo/Paulo Santos)

Metalworker Joao Maria Garcias sits on a bench in front of a tributary of the Tucunduba River while speaking with The Associated Press in Belem, Brazil, Sept. 23, 2024. (AP Photo/Paulo Santos)

Trash sits along the banks of a tributary of the Tucunduba River in Belem, Brazil, Sept. 24, 2024. (AP Photo/Paulo Santos)

Natasha Reis, spokeswoman for environmental nonprofit Mandi, poses for a photo in front of construction near a river in Belem, Brazil, Sept. 24, 2024. (AP Photo/Paulo Santos)