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The world's biggest risks
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The 10 crises the people's pope wants the world to address

Pope Francis waves to the German altar servers gathered in St. Peter's Square for a meeting of prayer on August 5, 2014 in Vatican City, Vatican.

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A holy man on a mission

Rock star Pope Francis' U.S. tour culminates in his speech at the United Nations on Friday. Throughout his tour, the pope has taken on some of the biggest global risks, highlighting his views on how to save the world from its gravest threats and its own worst impulses.

The pope's vocal stance on social, economic and diplomatic issues has been on full display during his trip through the Americas and his address to Congress on Thursday. Since first elected as the 266th Supreme Pontiff by the papal conclave some two and a half years ago, Pope Francis has used the position as a springboard for tackling global crises, largely breaking with papal tradition in the process. Climate change, income inequality, the European migrant crisis, warfare, criminal justice and social and religious tolerance are among the topics that have led many people to remark, "That's one cool pope!"

"All of us are quite aware of, and deeply worried by, the disturbing social and political situation of the world today," Pope Francis told Congress on Thursday. He later said, "We are asked to summon the courage and the intelligence to resolve today's many geopolitical and economic crises."

Here's a look at some of the words and deeds of Pope Francis as he addresses 10 of the world's biggest problems.

Mary E. Keefe, special to CNBC.com
Posted 25 September 2015

Franco Origlia | Getty Images