So mining and logging firms are seriously affected.

因而矿业和伐木公司都受到严重影响。

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It says one of Russia's biggest logging firms, Primorlesprom, is preparing to build a road through the Sikhote-Alin, one of the last untouched forests.

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But a sharp rise in the islands' population, and the arrival of logging and plantation firms, have made the situation much worse in recent decades.

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The research identified about 10 different monitoring firms logging content.

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