Even though it has been called the biggest threat facing humanity, for years, countries, particularly rich ones, have done nothing to fundamentally tackle climate change.

Global carbon emissions have increased by more than 48 percent since 1992, when the first UN climate change conference took place in Rio de Janeiro.

And with average global temperatures likely to rise by three or four degrees Celsius, scientists have warned that, if emissions continue to increase, we will pass the threshold after which climate change will become catastrophic and irreversible.

With so much at stake, more than 40,000 delegates from 195 countries are attending COP21 in the French capital, Paris - tasked with reaching the first truly universal climate pact.

About 150 nations have so far submitted national plans for fighting climate change, but there is no agreed system to compare each nation's level of ambition.

Jennifer Morgan, the director of the Climate Programme at the World Resources Institute, joins Counting the Cost to discuss whether a deal can be reached.

Source: Al Jazeera