U.N. climate negotiators sweat over detail and divides

People walk in front of the venue of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland December 5, 2018. REUTERS/Kacper Pempel

KATOWICE, Poland (Reuters) - Half-way through talks to breathe life into the Paris climate deal negotiators haggled over how to share the cost of curbing global warming and struggled to bridge deep political divides.

The two weeks of talks, which began at the start of the week, are billed as the most important U.N. conference since the Paris 2015 agreement on climate change.