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  From the section Africa Jump media player Media player help Out of media player. Press enter to return or tab to continue. Media caption Pope Francis was greeted with loud cheers at a refugee camp in Bangui Pope Francis, speaking during Mass in the Central African Republic (CAR) capital Bangui, has called on fighting factions to lay down their weapons. Instead, he said, they should arm themselves "with justice, love, mercy and authentic peace." Earlier he said he hoped next month's polls in the CAR would open a "new chapter" for the country. CAR has been torn apart by violence between Muslim rebels and Christian militias. It is the pontiff's first visit to a conflict zone and the final stop on his landmark three-nation African tour. Acting President Catherine Samba-Panza has asked him for "forgiveness" for the country's recent religious violence. Image copyright AFP Image caption Cheers sounded in the streets

COP21: Rallies call for Paris climate change action Image copyright EPA Image caption The protest in Rio de Janeiro involved plenty of mud Hundreds of thousands of people have marched worldwide to demand action to stop climate change, the day before a UN summit starts in Paris. One campaign group says more than 570,000 protesters took part in marches on all the main continents. Activists want action at the Paris talks to limit the rise in the average global temperature to 2C (3.6F) above pre-industrial levels. In Paris itself, more than 200 demonstrators were arrested after clashes. The day's events   In pictures: How eco-activists are mocking brands and leaders Why do two degrees matter? Earlier, a human chain was formed by hundreds linking arms in the French capital along the route of a march that was called off after the 13 November attacks that killed 130 people. A gap in the chain was left in front of the Bataclan concert hall, where 89 people were killed.