US National Research Council.
The report links coal as the major contributor worldwide, followed by oil and natural gas. Of the 30.6 tons, Europe, Australia and the US contribute half of the emissions, followed by China contributing about 2.5% and then India with .5%.
This is the highest since emissions were recorded and represent a jump of 1.66 Gt in the last ten years. This, according to scientists puts the globe on track for a temperature rise of around 3.5 degrees Celsius, beyond the two degree limit after which dramatic climate change will take place.
According to 350.org the window for recovering from such an increase may be closed.