Spruce bark beetles have boomed in Alaska thanks to 20 years of warm summers. The insects have chewed up 4 million acres of spruce trees.
阿拉斯加的云杉树皮虫发出隆隆声感谢过去20年暧和的夏天。昆虫已经毁坏掉了4百万英亩的云杉树。
Spruce bark beetles have boomed in Alaska thanks to 20 years of warm summers. The insects have chewed up 4 million acres of spruce trees.
阿拉斯加的云杉树皮虫发出隆隆声感谢过去20年暧和的夏天。昆虫已经毁坏掉了4百万英亩的云杉树。
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