The UN's top climate change chief has called for technologies that soak CO2 from the atmosphere - but are such techniques feasible? Tom Young investigates
The head of the UN Climate Change Secretariat this week told the Guardian that soaring levels of greenhouse gas emissions meant the world would have to develop "more powerful technologies to capture emissions...
Scientists, politicians, NGO leaders and business executives offer their takes on the Paris Agreement rulebook
COP24: Paris Agreement 'stays on course' as Rulebook breakthroughs underline global commitment to climate action
Talks in Katowice overran by more than a day, as late rows over carbon market rules escalated, but final agreement paves way for a ramping up of global decarbonisation efforts
Scheduled end of COP24 sails past as countries tussle over details of Paris Agreement Rulebook
Negotiators expect talks to run into the weekend, but hopes for finished rule book remain high