Pollution from Europe and Russia often creates a haze in the once pristine Arctic skies.
Pollution from Europe and Russia often creates a haze in the once pristine Arctic skies.
来自欧洲和俄国的污染，常在从前洁净的北极天空造出一片烟雾。
Pollution from Europe and Russia often creates a haze in the once pristine Arctic skies.
来自欧洲和俄国的污染，常在从前洁净的北极天空造出一片烟雾。