Share of Global Emissions in Carbon Dioxide Equivalent 2004

Climate Change Reference Guide and Glossary

Greenhouse Gas Sources, by Sector

Greenhouse gases come from a broad range of human activities, including energy use, changes in land use (such as deforestation), and agriculture.2

Source

Sample Emissiongenerating Activities

Energy Supply

Generation of primary

energy supplies, chiefly

from fossil fuels; produc-

tion of fuels for electricity,

transportation, and heat;

includes extraction and

refining

Industry

Production of metals, pulp

and paper, cement, and

chemical production

Forestry

Deforestation, decomposi

tion of biomass that

remains after logging

Agriculture

Crop and livestock

production

Transport

Travel by car, plane, train,

or ship

Residential and

Heating, cooling, and

Commercial Buildings

electricity

Waste

Landfills, incineration,

wastewater

Emissions by Sector, in Carbon Dioxide Equivalent, 2004

(13.1%) (13.5%)

Source: IPCC

Climate Change Reference Guide and Glossary

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