SintoDinto
IB Veteran
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there are conerns that the massive megaproject Three Gorges dam in China, which western experts in the 90s claimed was unsustainable, but which chinese dismissed as "racist" could collapse and kill 100 million and displace 400 million, leading to potential civilizational collapse, in part due to climate change leading to massive flooding along the yangtze river and due to the sheer age of the structure.