THE EMISSIONS GAP REPORT 2018 (UNEP)
Global greenhouse gas emissions show no signs of peaking. Global CO2 emissions from energy and industry increased in 2017, following a three-year period of stabilization. Total annual greenhouse gases emissions, including from land-use change, reached a record high of 53.5 GtCO2e in 2017, an increase of 0.7 GtCO2e compared with 2016.
Fluorinated gases (hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulphur hexafluoride (SF6)) are only responsible for 2.4 percent of total GHG emissions and continue to have strong growth at around 5 percent/year. The Kigali Amendment to the
Montreal Protocol on Substances that Deplete the Ozone Layer aims for the phase-down of hydrofluorocarbons (HFCs) by cutting their production and consumption.
Global greenhouse gas emissions per type of gas
Notes:
LUC = Land Use Change;
The chart includes emissions for the 6 greenhouse gases
CO2, CH4, N2O, and F-Gases (HFCs, SF6, PFCs) and LUC
Global GHG emissions in 2030 need to be approximately 25 percent and 55 percent lower than in 2017 to put the world on a least-cost pathway to limiting global warming to 2°C and 1.5°C respectively.
Source: UNEP (2018) The Emissions Gap Report 2018
http://www.unenvironment.org/emissionsgap
Explanatory Note: The Scientific Assessment of Ozone Depletion report states that HFC abundance in the atmosphere is 1.5% as a percentage of total emissions of all greenhouse gases. The Emissions Gap Report 2018 states that the annual emissions of F-Gases (HFCs, SF6 and PFCs) are 2.4%, as a percentage of the six GHGs (CO2, N2O, CH4, HFCs, SF6, and PFCs).