Carbon dioxide emissions are a major concern, but a study presented at the COP21 summit being held in France offered a bit of hope.

Carbon dioxide emissions are a major concern, but a study presented at the COP21 summit being held in France offered a bit of hope.
Though global emissions rose at an annual rate of 2% to 3% between 2000 and 2013, they are on course to decrease in 2015. 
The decline is anticipated to be 0.6%.