Factor in the sharp drop in forest resources around the world, due to natural or man-made factors causing forest area is significantly reduced.
森林资源锐减因素在世界范围内，由于受自然或人为的因素而造成森林面积正在大幅度地锐减。
Factor in the sharp drop in forest resources around the world, due to natural or man-made factors causing forest area is significantly reduced.
森林资源锐减因素在世界范围内，由于受自然或人为的因素而造成森林面积正在大幅度地锐减。
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