from Reuters: Top News https://reut.rs/2MG2emi
Brazilian miner Vale SA identified concerns around its tailings dams in 2009 and studied but did not implement several steps that could have prevented or lessened the damage from last week's deadly disaster, according to a corporate presentation seen by Reuters.

from Reuters: Top News https://reut.rs/2MG2emi
from Reuters: Top News https://reut.rs/2MG2emi

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