地理漫步·世界地理英语30篇（3）
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The Amazon: Lifeblood of the Rainforest
亚马孙河：雨林的生命之脉
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The Amazon River, over 6,400 kilometers long, is one of the world’s longest and most powerful rivers.
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It carries more freshwater to the ocean than any other river—about 20% of Earth’s total river discharge.
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Its vast basin supports the largest tropical rainforest on the planet, home to millions of species.
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Unlike many rivers, the Amazon has no natural delta because strong ocean currents scatter its sediment offshore.
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Indigenous communities have lived along its tributaries for over 11,000 years, adapting to seasonal floods.
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Deforestation upstream reduces rainfall recycling, threatening both forest health and regional climate stability.
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Hydroelectric dams on its southern tributaries now supply power to cities like São Paulo and Belo Horizonte.
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Scientists monitor mercury levels in fish there, as gold mining releases toxic metals into the water.