@CNN: You may think of the Antarctic as pristine wilderness. But it’s already showing the effects of human activity thousands of miles away. https://t.co/NFhwCAUzAL https://t.co/fkPqDzbqYn

@CNN: You may think of the Antarctic as pristine wilderness. But it’s already showing the effects of human activity thousands of miles away. https://t.co/NFhwCAUzAL https://t.co/fkPqDzbqYn