题目内容
The________barriers are consist of trade include quota and embargo by national regulations, and exchange controls.()
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The environmental awareness established at high level in ________ ________ countries.()
The reduction of the capacity of the environment to meet social and ecological objectives and needs called as ____________()
Floods, quakes, tidal waves, storms, and wildfires are _________ causes of ecological damage()
The effect of ecological damage on ecosystem is____________________()
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