Carbon flow, stock and budget according to the recent Geneva Report on Climate and Debt:

• Annual global CO2 emissions from fossil fuel and industry: 40 gigatonnes.
• Cumulative historical emissions since 1850: 2400 gigatonnes. They are responsible for a temperature rise of 1 degree Celsius.
• Remaining carbon budget given 1.5 degree Celsius temperature rise cap: 300 gigatonnes.