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The upper Acre River basin, shared by Bolivia, Brazil, and Peru, faces increasing climate risks, including more frequent floods and severe droughts, alongside significant deforestation (over 12% loss in 25 years). While regional agreements like the Amazon Cooperation Treaty exist, there is a gap in local implementation. The report suggests that effective transboundary governance should not rely on creating new structures but on synchronizing existing local water governance platforms in each country through voluntary coordination and decentralized, multi-actor participation.

This executive summary reports on the 2019 air quality monitoring in the state of Acre, Brazil, utilizing a network of 30 low-cost PurpleAir sensors across 22 municipalities. The study focused on particulate matter (PM2.5) concentrations between June and December 2019, identifying significant violations of World Health Organization (WHO) air quality standards primarily driven by biomass burning from deforestation and pasture management.