交作业。谢谢暖冬，辛苦了！

Alaska may look remote and pure, but no place on the earth is immune to air pollution, environmental contamination, and global warming that affects all of us.

 

阿拉斯加或许看似遥远纯净，但是地球上没有一个地方可以免受空气的污染，环境的污染，和影响我们所有人的全球变暖问题。