Al Jazeera: About 40,000 negotiators from nearly 200 countries are descending on the French capital for the UN conference on climate change or COP 21.
The decisions they make will have a major impact on how we live our lives and those of future generations.
Scientists have warned that if greenhouse gas emissions continue to rise, we will pass the threshold after which climate change will become catastrophic and irreversible.
That threshold is two degrees Celcius above pre-industrial levels, and scientists...