Climate Change mitigation: practical measures to limit global warming IPCC report 2014 Working Group III


Glossary over Climate Change mitigation: practical measures to limit global warming


The establishment of a forest through tree planting or seeding on land that has lacked forest cover for a very long time or has never been forested. (Source: GreenFacts)


The mass of air surrounding the Earth.

The atmosphere consists of nitrogen (78%), oxygen (21%), and traces of other gases such as argon, helium, carbon dioxide, and ozone.

The atmosphere plays an important role in the protection of life on Earth; it absorbs ultraviolet solar radiation and reduces temperature extremes between day and night. (Source: GreenFacts)



Biodiversity is a contraction of biological diversity. Biodiversity reflects the number, variety and variability of living organisms.

It includes diversity within species (genetic diversity), between species (species diversity), and between ecosystems (ecosystem diversity). (Source: GreenFacts)



Renewable energy made from materials from biological sources. Wood, charcoal, manure and crop residues are all traditional forms of bioenergy.

Bioenergy carriers produced from crops like maize or sugarcane are known as biofuels, while biogas refers to the mixture of methane and carbon dioxide produced by the bacterial decomposition of organic wastes. (Source: GreenFacts )


Biofuels are non-fossil fuels. They are energy carriers that store the energy derived from organic materials (biomass), including plant materials and animal waste.

They may be solid, such as fuelwood, charcoal and wood pellets; liquid, such as ethanol, biodiesel and pyrolysis oils; or gaseous, such as biogas. (Source: GreenFacts)


Carbon dioxide (CO2)

A colorless, odorless, non-combustible gas, present in low concentrations in the air we breathe (about three hundredths of one percent by volume).

Carbon dioxide is produced when any substance containing carbon is burned. It is also a product of breathing and fermentation. Plants absorb carbon dioxide through photosynthesis. (Source: The Pacific Forest Trust Glossary )


Carbon sequestration

The removal and storage of carbon from the atmosphere in carbon sinks (such as oceans, forests or soils) through physical or biological processes, such as photosynthesis.

Humans have tried to increase carbon sequestration by growing new forests. (Source: GreenFacts)


Climate change

The long-term fluctuations in temperature, precipitation, wind, and all other aspects of the Earth's climate.

It is also defined by the United Nations Convention on Climate Change as “change of climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods” (Source: CoRIS glossary  )


The conversion of forested land to non-forested land as a direct result of human activities. (Source: Forest Carbon Accounting Definitions  )


Environmental cycles

A natural process in which elements are continuously cycled in various forms between different compartments of the environment (e.g., air, water, soil, organisms).

Examples include the carbon, nitrogen and phosphorus cycles (nutrient cycles) and the water cycle. (Source: GreenFacts)


Fish oil

An oil extracted from body (body oil) or liver (liver oil) of fish and marine mammals; mostly a byproduct of fish meal production. (Source: NOAA  Glossary )

Fossil fuel(s)

A general term for buried combustible geologic deposits of organic materials, formed from decayed plants and animals that have been converted to crude oil, coal, natural gas, or heavy oils by exposure to heat and pressure in the Earth's crust over hundreds of millions of years. (Source: US EPA Glossary of Climate Change terms  )

Global scale

The geographical realm encompassing all of Earth. (Source: MA  Glossary )

Greenhouse gas

Greenhouse gases are those gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of infrared radiation emitted by the Earth’s surface, the atmosphere and clouds.

This property causes the greenhouse effect.

Water vapour (H2O), carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4), and ozone (O3) are the primary greenhouse gases in the Earth’s atmosphere. Moreover there are a number of entirely human-made greenhouse gases in the atmosphere, such as the halocarbons and other chlorine and bromine containing substances, dealt with under the Montreal Protocol. Beside CO2, N2O and CH4, the Kyoto Protocol deals with the greenhouse gases sulphur hexafluoride (SF6), hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs). (Source: IPCC Glossary  )

Intergovernmental Panel on Climate Change

The Intergovernmental Panel on Climate Change (IPCC) has been established by WMO and UNEP to assess scientific, technical and socio- economic information relevant for the understanding of climate change, its potential impacts and options for adaptation and mitigation.

IPCC publications are prepared by three Working Groups (WG I, II and III) composed of hundreds of scientists from many countries. The IPCC's Fourth Assessment Report (4AR), published in 2007, is available at .

The "Summaries for Policymakers" by the three Working Groups, which were used as the source for the GreenFacts Digest on Climate Change (2007), can be found below:

The IPCC's previous report on climate change, the 2001 Third Assessment Report (TAR), was also summarised by GreenFacts (click here for the Digest).

In 2007, the IPCC shared the Nobel Peace Prize with Al Gore "for their efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change". (Source: IPCC website  )

Land use

The human use of a piece of land for a certain purpose (such as irrigated agriculture or recreation). Influenced by, but not synonymous with, land cover. (Source: MA  Glossary )


Mathematical representation or simulation of an actual situation. (Source: GreenFacts)


Refers to the amount of disturbance or stress that an ecosystem can absorb and still remain capable of returning to its pre- disturbance state. (Source: GreenFacts, based on Millennium Ecosystem Assessment  Glossary )



A characteristic or state whereby the needs of the present and local population can be met without compromising the ability of future generations or populations in other locations to meet their needs.



Naturally occurring heavy metal that is denser than lead.

Uranium is radioactive and is the principal fuel of nuclear reactors. (Source: GreenFacts )

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