"But in the end, maintenance became too labor-intensive, Evans said. As trees were removed from the landscape, sediment began accumulating in the canals at a rate more rapid than it could be removed. Many dike walls collapsed, although it is not yet known when that occurred."
In the Los Angeles Times, Thomas H. Maugh II reports the latest information about medieval Angkor, described by archaeologists as the largest preindustrial city in history.
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