BRZEGI, Poland — Pope Francis challenged hundreds of thousands of young people who gathered in a sprawling Polish meadow to reject being a "couch potato" who retreats into video games and computer screens and instead engage in social activism and politics to create a more just world.

Peppering his speech with contemporary lingo, the 79-year-old pope, despite a long day of public appearances, addressed his eager audience with enthusiasm Saturday on a warm summer night.

SEE ALSO: Pope: Gay...

Continue Reading Pope Francis to young people: Don't be a video game-playing 'couch potato'