The scourge is also affecting the eastern province of Entre Rios and Chaco in the north.

灾害同样祸及了东部的恩特雷里奥斯省和北部的查科省。

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Worldwide food shortages and rock-bottom land prices in Paraguay have made the Chaco the last agricultural frontier.

全球范围的粮食短缺以及巴拉圭岩石底土地价格的飞涨，终于让查科变成了人们争相获取的最后一片农业用地。

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A spokesman for the environment ministry said: "we know what is happening in the Chaco but there's little we can do."

环境部发言人说：“我们对查科所发生的一切了如指掌，但我们却无能为力。”

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Paulson Chaco is Director of the Navajo Division of Transportation occupying a cabinet level position to the President of the Navajo Nation.

WHITEHOUSE: Champions of Change Blog

Grass-cutting ants occur in the Chaco region of north Argentina and Paraguay and belong to a subgroup of leaf-cutting ants that specialise in harvesting grass leaves.

BBC: Earth News - Ant's head balancing act revealed by video

It's a bitter blow for the museum, and for the plants and animals of the Gran Chaco, which is threatened by illegal logging and forest clearance for agriculture.

BBC: Paraguayan expedition abandoned