US Treasury Secretary Janet Yellen visited the Amazon River, advocating for climate change action to drive global economic growth. She called it the top opportunity of the 21st century. Yellen proposed investing $3 trillion annually until 2050 to support sustainable and inclusive growth, particularly in historically underserved regions. The event, organised by the Inter-American Development Bank, aimed to promote carbon reduction, wildlife protection, and biodiversity while preserving jobs and economic activity in eight South American countries.