The UN climate change conference in Dubai is close to a big breakthrough on reducing the gases heating our planet, its United Arab Emirates hosts believe. Expressing "cautious optimism", the UAE negotiating team believes COP28 is gearing up to commit to phasing down fossil fuels over coming decades. Maybe even ditching them altogether. Hosting a climate conference in a petrostate sounds like the beginning of a bad joke, but there are signs that it could deliver real progress on climate. (BBC News)