BBC: Negotiators meeting in Germany say that questions over cash are the biggest barrier to a new global climate deal.
The Bonn talks are the last chance for delegates to clarify their positions before the Paris conference that aims to seal a new binding treaty.
Developing country delegates said clear guarantees on finance must be a core part of that compact.
Officials said that finance was likely to be the very last issue to be resolved before a deal is struck.
Money has always been at the...