Transport chaos in Kenya

There's been chaos in Kenya's capital after city officials enforced an order banning minibuses, popularly known as matatus, from accessing the central business district + 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 + New hope for sickle cell sufferers as new drug gets the green light in Africa