Tree studies link climate change to calamity | The Japan Times Online
The tree ring evidence reveals that at least five prolonged droughts have shaken Asia in the last millennium, playing significant roles in the 1644 fall of China's Ming dynasty, the collapse of 18th century kingdoms in what are now Myanmar, Thailand and Vietnam, and an 1876-1878 famine that killed up to 30 million people in South Asia, Southeast Asia and China.
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