COP21: Climate issues dividing rich and poor nations

When you have 195 countries negotiating at the climate change conference in Paris, some key issues remain contentious.

Some of the world's poorest countries say they fear being "left behind" in the push for a new treaty.

BBC News explains the key points dividing the rich and poor nations in the climate debate.

COP 21 - the 21st session of the Conference of the Parties - will see more than 190 nations gather in Paris to discuss a possible new global agreement on climate change, aimed at reducing greenhouse gas emissions to avoid the threat of dangerous warming due to human activities.

Explained: What is climate change?

In video: Why does the Paris conference matter?

Analysis: Latest from BBC environment correspondent Matt McGrath

More: BBC News special report (or follow the "COP21" tag in the BBC News app)