From New Zealand's sewage power to India's solar mission, we run down the top stories from the past week
Flushed with success: New Zealand makes biofuel from sewage Solray Energy stakes claim to world's largest algae refinery, which converts toilet wastewater to biofuel Insurance giant warns...
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