Climate change progress 'too slow'
By Helen Briggs BBC Environment correspondent, Bonn, Germany
Scientists say ambitious action is needed to avert the most severe impacts of climate change.
So far, more than 30 countries have pledged to limit emissions of greenhouse gases, with around 150 smaller countries yet to set goals.
Analysis suggests these do not go far enough to keep global warming below 2C.
Environmental groups point to key developments outside of the negotiations that are adding momentum towards Paris.
They include moves by business, such as Ikea giving $1bn to expand renewable energy and climate adaptations in developing countries.
G7 leaders have also signalled the need for action with a call for greenhouse gas emissions cuts and a move towards a low carbon future.
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