Global greenhouse gas emissions in 2010 totaled 48,629 megatons of carbon dioxide equivalent. Fossil fuel combustion accounted for the majority (34.6%) of emissions, with coal (25%), oil (21%), and natural gas (19%) being the largest contributors. Land use change, such as deforestation, accounted for 15% of emissions. The main economic sectors emitting greenhouse gases were energy (35%), industry (29%), agriculture (8.3%), and transportation (15%).

1. Source*
World GHG Emissions Flow Chart
Analysis by Ecofys. All the data are for 2010.
The global estimate of 48 629 MtCO2 equivalent results from adding up all calculated data on sector level.
All percentages relate to the total emission worldwide. The data for Land Use Change are subject to significant uncertainties.
This chart is inspired by a previous chart of WRI, 2005
The following sources were used:
IEA, 2012, CO2 emissions database
Joint Research Centre, European Commission, 2011, Global Emissions EDGAR v4.2, available at http://edgar.jrc.ec.europa.eu/overview.php?v=42
CDIAC, 2012, Preliminary CO2 Emissions 2011, available at http://cdiac.ornl.gov/ftp/trends/emissions/
IEA, 2012, Energy Balances
Global Carbon Project, 2012, data abailable at http://www.globalcarbonproject.org/carbonbudget/12/data.htm
Greenhouse gas
Total emission worldwide (2010)
48 629
MtCO2 eq
Coal
25%
Natural Gas
19%
Oil
21%
Waste
0.4%
Sector
2013 Duurzaambedrijfsleven.nl
designbyTeunBrouwer
Direct
emissions
34.6%
* Greenhouse gases can arise from two sources
Fossil fuel related emissions
Burning fossil fuels (coal, natural
gas and oil) in industry, residential
sector, commercial & public sector,
transport and energy supply.
Direct emissions (examples)
Sector: Land Use Change
Cutting down trees for logging or
agriculture releases CO2 stored in
the biomass.
Direct emissions (examples)
Sector: Agricultural
Cows and other livestock emit tons
of methane (CH4) by passing gas
each day.
N20
7%
CH4
15%
CO2
76%
HFCs & PFCs
2%
Direct emissions (examples)
Sector: Waste
Organic matter in landfills emits
tons of methane each year.
Transport
15%
Residential Buildings
11%
Commercial/Public Buildings & Services
7%
Land Use
Change
15%
Industry
29%
7%
6.0%
4.8%
4.3%
1.4%
1.1%
1.0%
10.5%
1.5%
2.6%
10.5%
5.5%
1.4%
1.8%
3.1%
4.4%
10.3%
Other industries
Paper, pulp and printing
Food and tobacco
Non-ferrous metals
Chemical and petrochemical
Iron and steel
Non-metallic minerals
Aviation
Others
Road
Livestock and manure
Agricultural Energy Use
Coal Mining
Oil and gas extraction, refining and processing
Deforestation/Afforestation and Land Use CO2
Agricultural soils
1.3%
1.6%
Landfills
Waste water & othersWaste 3%
Agriculture
Energy Supply
13% 8.3%Energy industry own use & losses
2010