Climate Change humanity's "greatest threat"

A UN conference on tackling climate change has officially opened in Poland with a stark warning to delegates not to be the generation to betray humanity. British naturalist Sir David Attenborough has said climate change is humanity's greatest threat in thousands of years + In 20 days, citizens of the Democratic Republic of Congo will vote to elect the next president of the country, but how much do they know about their option-candidates? We hear from opposition candidate Martin Fayulu + Kenyans stamp their feet as a ban on mini buses to access central business districts is enforced.