Blue and Green: UKs prime minister David Cameron said in a speech at the UNs climate summit that the country is on track to reduce emissions by 80% by 2050 but that businesses and the poorest countries need assistance in order to thrive in a low-carbon future. Speaking in New York, where world leaders gathered to discuss action on climate change, in order to ease the reaching of a global climate agreement in Paris in 2015, Cameron said the UK is playing its part. The PM said, We now need the whole world though...