地理漫步·世界地理英语30篇（3）

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亚马孙河：雨林的生命之脉

The Amazon River, over 6,400 kilometers long, is one of the world’s longest and most powerful rivers.
It carries more freshwater to the ocean than any other river—about 20% of Earth’s total river discharge.
Its vast basin supports the largest tropical rainforest on the planet, home to millions of species.
Unlike many rivers, the Amazon has no natural delta because strong ocean currents scatter its sediment offshore.
Indigenous communities have lived along its tributaries for over 11,000 years, adapting to seasonal floods.
Deforestation upstream reduces rainfall recycling, threatening both forest health and regional climate stability.
Hydroelectric dams on its southern tributaries now supply power to cities like São Paulo and Belo Horizonte.
Scientists monitor mercury levels in fish there, as gold mining releases toxic metals into the water.