Worldwide GHG emissions

Exec Sum world anthropogenic GHG emissions

60Gt in 2019 (1 Gt = 10^9 tonnes)

main GHG : CO2, CH4, N20, F-gases

64% CO2 from fossil fuel and industry (FFI), 11% CO2 from land use & forestry (LU), 18% CH4

FFI is fastest absolute growth (+67% vs 1990), F-gases fastest relative growth

Source : IPPC (GIEC) report Group AR6 WGIII

What does CO2e mean?

Other gases, especially methane and nitrous oxide also warm the planet: we convert their warming potential into CO₂ equivalent to simplify the measurement.

Emissions by sector (assuming 60Gt all GHG in 2019) :

Energy 20Gt : 30% all GHG

Industry 10Gt : 15% all GHG

Transport 8 Gt : 13% all GHG

Food, agriculture & forestry (LULUCF) 3 Gt : 5 % all GHG

Buildings 2 Gt : 3% all GHG

Non-CO2 from all sectors : 20 GT : 33% all GHG

Source : IPCC_AR6_WGIII_SPM

Energy based emissions

Global Energy Review: CO2 Emissions in 2021 - Analysis - IEA

The global CO2 emissions and energy demand numbers are based on the IEA's detailed region-by-region and fuel-by-fuel analysis, drawing on the latest official national data and publicly available energy, economic and weather data.

https://www.iea.org/reports/global-energy-review-co2-emissions-in-2021-2