The Amazon River accounts for one-fifth of the world's freshwater flow, and its floodplain is home to 60% of the world's remaining tropical rainforests. The basin's diverse ecosystems support an unparalleled array of biodiversity, and provide home to tens of thousands of indigenous people. Yet the Brazilian government sees the untapped hydropower potential of the mightly Amazon River as a tool for industrial and urban expansion, no matter the cost to the environment or the indigenous communities.