Kerry's Arctic climate change adventure hits Greenland

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U.S. Secretary of State John Kerry has brought his tour of the Arctic to Greenland, where he's visiting the Northern Hemisphere's largest glacier to bring attention to the dangers of climate change.

A day after visiting an ice cap in Norway's extreme north that has been significantly eroded by rising temperatures, Kerry on Friday was inspecting Greenland's Sermeq Kujalleq Glacier. That's 220 miles (350 kilometers) north of the Arctic Circle. The glacier is the most productive outside Antarctica in terms of iceberg production. Its study is considered critical to understanding the effects of climate change.

As America's top diplomat, Kerry has made the health of oceans and combating climate change a priority. He will host an international conference on oceans in September, the third such event he has organized.