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Indicator Assessment
Fig. 1 reflects the historic trends and projected progress of European countries since 1990.
According to the latest official data published by the EEA in June 2016, GHG emissions in the EU-28 in 2014 amounted to 4 286 million tonnes CO2-equivalent (Mt CO2-eq) (4 421 Mt if CO2 from international aviation is included), reaching their lowest level since 1990.
GHG emissions decreased in most sectors between 1990 and 2014, with the exception of transport (including international transport), and refrigeration and air-conditioning (Fig. 2).
At an aggregate level, the biggest share of the emissions reductions during this 24-year period is split almost equally between industry and energy supply (jointly more than 1 000 Mt of emissions reductions). A combination of factors explain lower emissions in industrial sectors. These include improved efficiency in restructured iron and steel plants, substantial improvements in carbon intensity, and structural changes to the economy with a higher share of services and a lower share of more intensive industry in the total activity of this sector. The economic recession that started in the second half of 2008 and continued through to 2009 also had a substantial impact on emissions. For energy supply, improvements in the transformation efficiency of electricity and heat production, and the move towards less carbon intensive fuels at EU level have been the main reasons for the 28 % reduction of emissions. Important emissions reductions have been also achieved in the residential and commercial sectors, and agriculture.
On the negative side, CO2 emissions from road transportation increased by more than 120 Mt in this period; emissions increased steadily between 1990 and 2007, before decreasing until 2013 and increasing again in 2014. The overall increase was fully accounted for by a strong uptake of diesel and a decline in gasoline use. International aviation and shipping have also seen increased emissions since 1990, up by 97 % and 24 % respectively. Total transport, including international bunkers, accounts for about a quarter of GHG emissions in the EU. The second largest increase in the EU emissions came from hydrofluorocarbons (HFCs) used in refrigeration and air conditioning equipment. This is the only group of gases with increased emissions since 1990.
CO2 emissions from biomass combustion have also increased significantly since 1990. These emissions, together with the net LULUCF emissions and/or removals, are not included in the national GHG emissions totals, in line with the UNFCCC Reporting Guidelines, but are reported as a memorandum item. Their increase highlights the rapidly increasing importance of bioenergy in replacing fossil fuel sources.
Between 2013 and 2014, GHG emissions in the EU-28 decreased by 4.1 % and accounted for a net reduction of 185 Mt CO2-eq (183 Mt if international aviation is included). The decrease in total GHG emissions was driven by emissions reductions in the energy sector, particularly in electricity and heat production, and in the residential and commercial sectors. This was due to the warmer conditions in Europe in 2014 as well as to the increase in non-combustible renewables used for electricity generation.
A detailed analysis of the 1990-2014 changes in GHG emissions is provided in the EEA technical paper ‘Analysis of key trends and drivers in greenhouse gas emissions in the EU between 1990 and 2014’.
According to the latest ‘Trends and Projections’ report, published in October 2015, emissions are expected to continue to decrease to levels between 24 % and 25 % below those of 1990, which is below the EU's 20 % unilateral reduction target. Projections beyond 2020 show further decreases in EU GHG emissions. However, Member States expect that the pace of these reductions will slow down. Planned reductions will only bring EU emissions down to levels between 27 % and 30 % below those of 1990 by 2030. This is insufficient to achieve the 40 % reduction target for 2030.
EU progress towards the 2020 targets
Under the ‘Climate and Energy Package’, adopted in 2009, the EU committed to a unilateral emissions reduction target of 20 % by 2020 compared to 1990, which corresponds to a 14 % decrease from 2005 levels. The main two instruments for achieving this target are:
In 2014, total EU GHG emissions under the scope of the EU's climate and energy package (including international aviation) are estimated to be 23 % below 1990 levels. Between 2005 and 2014, emissions covered by the EU ETS (which represents about 42 % of total EU GHG emissions) decreased by 24 % (more than 560 Mt CO2-eq), while GHG emissions not covered by the ETS decreased by almost 13 % during the same period (Fig. 3).
The ETS sectors that experienced particularly large emissions decreases are cement clinker and lime. Emissions reductions from combustion installations, which represent more than 70 % of all ETS emissions and are dominated by electricity generation, are largely due to changes in the mix of fuels used to produce heat and electricity; while the use of hard coal and lignite fuels in electricity generation declined in this period, electricity generation from renewables increased considerably. The reduction in emissions may also have benefited from improvements in transformation efficiency for electricity generation, which means that less primary energy was necessary to generate a constant quantity of electricity. The cement, lime and iron and steel sectors follow similar trends, with emissions increasing until 2007 and then decreasing. These emissions reductions were, to a large extent, driven by reduced production due to the economic crisis.
The progress of the ETS sector towards its 2020 target is further analysed in the 2015 annual EEA technical report 'Trends and Projections in the EU ETS' .
Progress of EU countries towards their ESD targets
Under the ESD, Member States are required to limit those GHG emissions that are not covered by the EU ETS for the period 2013 and 2020, by meeting binding annual limits. The annual targets – known as annual emissions allocations - follow a straight line between a defined starting point in 2013 and the target for 2020.
The assessment of current progress towards the ESD targets compares the non-ETS emissions of each year with the annual national targets. According to the latest estimates by the EEA carried out in October 2015, in 2013 all Member States were below their national ESD targets. The 2014 data seem to confirm this trend across the EU (Fig. 4).
National projections show that in most Member States, ESD emissions will remain below annual ESD targets until 2020. However, in four Member States (Austria, Belgium, Ireland and Luxembourg) emissions in 2020 could exceed targets if no additional measures are implemented.
In the second half of 2016, a better evaluation of progress to the 2020 targets will be performed on the basis of the latest information reported by Member States. The results of this evaluation, including a detailed assessment of progress towards climate and energy targets in the EU will be presented in the EEA’s 'Trends and Projections in Europe 2016' report.
The present indicator (CSI010) presents total and sectoral trends of anthropogenic GHG emissions in Europe from 1990 onwards and assesses the progress of the EU, individual Member States and other EEA countries towards their international and internal EU GHG targets.
The indicator provides information on emissions from the main anthropogenic GHG sources, distributed by the main emitting sectors and based on IPCC nomenclature. In addition, the indicator shows past and projected GHG emissions in the Emissions Trading Scheme (ETS) and non-ETS/Effort Sharing Decision (ESD) sectors, in accordance with the EU legal scheme. As a general rule, emissions from international aviation are included in the totals presented in the indicator, consistent with the EU legal scheme ('Domestic scope'). These emissions are not covered by the Kyoto Protocol (KP), in accordance with the UNFCCC guidelines, and therefore they are excluded from the totals under the EU's international reporting of GHG inventories ('International scope'). Unless otherwise mentioned, the indicator does not cover emissions from international shipping. Net land use, land use change and forestry (LULUCF) emissions and/or removals, and CO2 emissions from the combustion of biomass (including biofuels in transport) are not included in national GHG emission totals, according to UNFCCC Reporting Guidelines.
The indicator covers all 28 Member States of the European Union. The Member States' geographical coverage of the indicator is consistent with the EU coverage under the Kyoto Protocol. When available, information concerning other EEA member countries is also included. Especially when referring to the second commitment period of the KP, the European aggregates are presented for the 28 Member States and Iceland, since the European Union, its Member States and Iceland have agreed to fulfill their quantified emission limitation and reduction commitments jointly.
The indicator covers annual emissions since 1990.
This indicator expresses GHG emissions in 'million tonnes CO2-equivalent' (Mt CO2e)
The UNFCCC sets an ultimate objective of stabilising GHG concentrations 'at a level that would prevent dangerous anthropogenic (human induced) interference with the climate system.' It also requires precise and regularly updated inventories of GHGs from industrialised countries.
The Kyoto Protocol is an international agreement linked to the UNFCCC, which sets binding targets for industrialised countries and the European Union for reducing GHGs. It runs over two commitment periods; the first started in 2008 and ended in 2012, whereas the second started in 2013 and will end in 2020. The EU and its Member States have signed up to the Protocol.
The European Union, as a party to the UNFCCC and to the Protocol, reports annually on the GHG emissions within the area covered by its Member States. The Annual European Union greenhouse gas inventory and inventory report, officially submitted to the UNFCCC Secretariat, is prepared on behalf of the European Commission (DG CLIMA) by the EEA and its European Topic Centre for Air and Climate Mitigation (ETC/ACM), supported by the Joint Research Centre and Eurostat.
In 2007, EU leaders committed to a 20 % reduction in EU GHG emissions by 2020 on the basis of 1990 GHG emissions (or a 14 % decrease in GHG emissions between 2005 and 2020). The EU has also committed to increasing the share of renewable energy in the EU's final energy consumption to 20 % (with a minimum 10 % share in the transport sector), and to save 20 % of the EU’s energy consumption through increased energy efficiency (the '20-20-20' objective).
The EU 2020 Climate and Energy Package, adopted in 2009, sets a two-fold legislative framework to achieve the 20 % GHG emission reduction objective: a 21 % reduction of emissions covered under the EU ETS, compared with 2005 levels, to be achieved across the whole EU and an effort to reduce emissions not covered by the EU ETS by about 10 % compared with 2005 levels, shared between the EU Member States through differentiated annual national GHG targets under the ESD.
Building on the 2020 climate and energy package, the European Council recently adopted the 2030 climate and energy framework, which sets a target of a 40 % reduction in GHG emissions compared with 1990 as well as renewable energy and energy efficiency targets of at least 27 % by 2030. The 2030 framework is an EU priority, which follows the Paris Agreement and is consistent with the longer term objective of the '2050 low-carbon economy roadmap', which sets the EU ambition to reduce its GHG emissions by 80 % compared with 1990, with milestones of 40 % by 2030 and 60 % by 2040.
The current indicator aims to present an assessment of the EU's progress and that of individual countries towards their international and national targets under the Kyoto Protocol (in both commitment periods: 2008-2012 and 2013-2020) and under the ESD respectively. The indicator is based on the official GHG inventories submitted by the EEA countries and the EU to the UNFCCC, as well as on the projected GHG emissions submitted by the Member States under the Monitoring Mechanism Regulation (Regulation 525/2013, MMR). In order to calculate the distance to the national ESD targets, emissions reported in the EU Emissions Trading System (EU ETS) are also taken into account.
First commitment period (CP1), 2008-2012
For the first commitment period (2008-2012), the 15 States that were EU members in 1997, when the Kyoto Protocol was adopted, took on an 8 % reduction from the base-year target that was then redistributed among themselves, taking advantage of a scheme under the Protocol known as a 'bubble', whereby countries have different individual targets, which when combined make an overall target for that group of countries. The differentiated targets are set out in Annex II to the Council Decision 2002/358/EC concerning the approval, on behalf of the European Community, of the Kyoto Protocol to the UNFCCC and the joint fulfillment of commitments thereunder.
Under the Kyoto Protocol, the other (non EU-15) Member States (apart from Cyprus and Malta) have individual targets. Bulgaria, Czechia, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia have reduction targets of 8 % from the base year, while Hungary and Poland have reduction targets of 6 % and Croatia has a reduction target of 5 %. Of the additional EEA member countries, Norway and Iceland are allowed to increase emissions under the Kyoto Protocol by 1 % and 10 %, respectively, from their base-year emissions. Liechtenstein and Switzerland have reduction targets of 8 %. Turkey is a Party to the Kyoto Protocol but has no reduction target.
Second commitment period (CP2), 2013-2020
The EU, its 28 Member States and Iceland agreed to a joint quantified emission reduction commitment of 80 % under the Kyoto Protocol's second commitment period (2013-2020). This is equivalent to a 20 % reduction compared with base-year levels. The 'initial report' of the EU and Iceland (EU-KP) will contain the assigned amount for the second commitment period, as calculated by the Party and will be submitted to the UNFCCC in 2016.
EU greenhouse gas targets for 2020
The unilateral 20 % GHG reduction target, in the context of the EU Climate and Energy Package, corresponds to a 14 % decrease in emissions between 2005 and 2020. The target is to be achieved both in the sectors covered by the EU ETS (21 % reduction in EU ETS emissions compared with 2005 levels) and in the other sectors covered by national emission targets under the ESD.
The ESD targets used in the indicator are consistent with the EU ETS scope for the third trading period (2013–2020), based on Commission Decision 2013/162/EU of 26 March 2013 on determining Member States' annual emissions allocations for the period 2013-2020, pursuant to Decision No 406/2009/EC of the European Parliament and of the Council (OJ L 90, 28.3.2013, p. 106–110) and Commission Implementing Decision 2013/634/EU of 31 October 2013 on the adjustments to Member States' annual emissions allocations for the period 2013-2020, pursuant to Decision No 406/2009/EC of the European Parliament and of the Council (OJ L 292, 1.11.2013, p. 19–22).
The ESD targets (2020 percentage target compared with 2005, and annual absolute targets consistent with the 2013-2020 ETS scope and global warming potentials from the IPCC AR4) are presented in the table below:
Country |
2020 Target (%) |
2013 |
2014 |
2015 |
2016 |
2017 |
2018 |
2019 |
2020 |
Austria |
-16 |
52.63 |
52.08 |
51.53 |
50.99 |
50.44 |
49.90 |
49.35 |
48.80 |
Belgium |
-15 |
78.38 |
76.85 |
75.32 |
73.79 |
72.26 |
70.74 |
69.21 |
67.68 |
Bulgaria |
20 |
26.93 |
27.20 |
27.47 |
27.73 |
28.00 |
28.27 |
28.54 |
28.80 |
Croatia |
11 |
19.61 |
19.81 |
20.00 |
20.19 |
20.38 |
20.57 |
20.76 |
20.95 |
Cyprus |
-5 |
5.92 |
5.92 |
5.93 |
5.93 |
5.93 |
5.94 |
5.94 |
5.94 |
Czechia |
9 |
62.47 |
63.21 |
63.95 |
64.69 |
65.43 |
66.17 |
66.91 |
67.65 |
Denmark |
-20 |
36.83 |
35.93 |
35.02 |
34.12 |
33.21 |
32.31 |
31.41 |
30.50 |
Estonia |
11 |
6.30 |
6.32 |
6.35 |
6.37 |
6.39 |
6.42 |
6.44 |
6.47 |
Finland |
-16 |
31.78 |
31.29 |
30.80 |
30.31 |
29.82 |
29.34 |
28.85 |
28.36 |
France |
-14 |
394.08 |
389.46 |
384.43 |
379.40 |
374.38 |
369.35 |
364.32 |
359.29 |
Germany |
-14 |
472.53 |
465.83 |
459.13 |
452.44 |
445.74 |
439.04 |
432.34 |
425.65 |
Greece |
-4 |
58.96 |
59.28 |
59.61 |
59.94 |
60.26 |
60.59 |
60.92 |
61.24 |
Hungary |
10 |
50.40 |
51.52 |
52.63 |
53.75 |
54.87 |
55.99 |
57.10 |
58.22 |
Ireland |
-20 |
46.89 |
45.76 |
44.63 |
43.50 |
42.37 |
41.24 |
40.11 |
38.97 |
Italy |
-13 |
308.16 |
306.20 |
304.23 |
302.27 |
300.30 |
298.34 |
296.38 |
294.41 |
Latvia |
17 |
9.26 |
9.35 |
9.44 |
9.53 |
9.62 |
9.72 |
9.81 |
9.90 |
Lithuania |
15 |
12.94 |
13.30 |
13.66 |
14.02 |
14.38 |
14.74 |
15.10 |
15.46 |
Luxembourg |
-20 |
9.54 |
9.34 |
9.14 |
8.94 |
8.74 |
8.54 |
8.34 |
8.14 |
Malta |
5 |
1.17 |
1.17 |
1.17 |
1.16 |
1.16 |
1.16 |
1.16 |
1.16 |
Netherlands |
-16 |
122.95 |
120.68 |
118.40 |
116.13 |
113.86 |
111.59 |
109.31 |
107.04 |
Poland |
14 |
193.64 |
194.89 |
196.13 |
197.37 |
198.61 |
199.86 |
201.10 |
202.34 |
Portugal |
1 |
49.31 |
49.59 |
49.86 |
50.14 |
50.41 |
50.69 |
50.97 |
51.24 |
Romania |
19 |
75.63 |
77.45 |
79.27 |
81.10 |
82.92 |
84.74 |
86.56 |
88.38 |
Slovakia |
13 |
24.02 |
24.38 |
24.74 |
25.10 |
25.46 |
25.82 |
26.18 |
26.54 |
Slovenia |
4 |
12.32 |
12.35 |
12.38 |
12.41 |
12.44 |
12.47 |
12.50 |
12.53 |
Spain |
-10 |
227.56 |
225.65 |
223.73 |
221.82 |
219.90 |
217.99 |
216.07 |
214.16 |
Sweden |
-17 |
41.69 |
41.04 |
40.40 |
39.76 |
39.12 |
38.48 |
37.84 |
37.20 |
United Kingdom |
-16 |
358.74 |
354.22 |
349.70 |
345.18 |
340.66 |
336.14 |
331.62 |
327.10 |
EU greenhouse gas targets post 2020
In October 2015, the European Council adopted the '2030 climate and energy framework', setting a binding target to cut emissions in the EU territory by at least 40 % below 1990 levels by 2030. To achieve this target of at least 40 %:
The 2030 framework is consistent with the longer-term objective of the '2050 low-carbon economy roadmap', which sets the EU ambition to reduce its GHG emissions by 80 % compared with 1990, with milestones of 40 % by 2030 and 60 % by 2060. It is also a milestone for the EU’s contribution to the Paris Agreement, which was adopted in December 2015.
This indicator is based on the official GHG inventories submitted by the EEA countries to the EEA, as well as on the projected GHG emissions submitted by the Member States under the Monitoring Mechanism Regulation (Regulation 525/2013, MMR). The official EU GHG inventory submitted by the EU to the UNFCCC is based on the same data and is also used. The EU ETS emissions, as provided to the European Commission, are also used. When available, approximate estimates of the GHG emissions for the year (X-1) are also presented.
More information on the datasets used is given in the paragraphs below.
Greenhouse gases
In line with the UNFCCC reporting guidelines on annual inventories, the national inventories cover emissions and removals of the following GHGs:
- carbon dioxide (CO2), including indirect CO2;
- methane (CH4);
- nitrous oxide (N2O);
- hydrofluorocarbons (HFCs);
- perfluorocarbons (PFCs);
- suphur hexafluoride (SF6); and
- nitrogen trifluoride (NF3)
from six sectors (Energy, Industrial processes and product use, Agriculture, LULUCF, Waste and Other).
The gases do not include the GHGs that are also ozone-depleting substances, which are controlled by the Montreal Protocol (see CSI006).
Emissions from LULUCF are not included in total GHG emissions presented in the indicator. Because of this, CO2 emissions from the combustion of biomass (including biofuels in transport) are also reported as a memorandum item to avoid double counting of emissions from a reporting perspective. These emissions are not covered by the KP, in accordance with the UNFCCC guidelines, and therefore, they are excluded from the totals under the EU's international reporting of GHG inventories ('International scope'). Unless otherwise mentioned, the indicator does not cover emissions from maritime transport.
In order to be aggregated, non-CO2 gases are weighted by their respective global warming potential (GWP) and presented in CO2-equivalent units. Global warming potential (GWP) is a measure of how much a given mass of a GHG is estimated to contribute to global warming on a 100-year horizon.
In accordance with the UNFCCC rules, the GWP values used in this indicator are the ones from IPCC AR4:
Gas |
Global warming potential values from IPCC AR2 [before 2015] |
Global warming potential values from IPCC AR4 [after 2015] |
Carbon dioxide (CO2) |
1 |
1 |
Methane (CH4) |
21 |
25 |
Nitrous oxide (N2O) |
310 |
298 |
Sulphur hexafluoride (SF6) |
23 900 |
22 800 |
Nitrogen trifluoride (NF3) |
_ |
17 200 |
HFCs and PFCs comprise a large number of different gases that have different GWPs. The full list of GWPs can be found here: IPCC AR 4
Greenhouse gas inventories
For the preparation of their national inventories, countries use the methodologies of the 2006 IPCC Guidelines for National Greenhouse Gas Inventories.
Parties have also agreed to use the formats indicated in Decision 24/CP.19. According to this, the reporting of GHG emissions is allocated in six sectors (Energy, Industrial processes and product use, Agriculture, Land use, land use change and forestry (LULUCF), Waste and Other).
In the indicator, GHG emissions are attributed to the main emitting sectors at a disaggregated level, based on the IPCC definition of source categories and the common reporting format (CRF) followed by Parties. For this, the following categories are referenced:
Projected greenhouse gas emissions
For projected GHG emissions, information submitted by the EEA countries under the MMR is used. The projected GHG emissions referred to in the indicator are those reported under the 'with existing measures' scenario (WEM) and the 'with additional measures' scenario (WAM).
Emission trading system emissions
Emissions from the EU ETS are also presented in the indicator. The EU ETS runs over three trading periods: Phase I (2005-2007), Phase II (2008-2012) and Phase III (2013-2020).
In 2013, the scope of the EU ETS was expanded to include additional references to (a) the capture, transport and geological storage of GHG emissions; (b) CO2 emissions from petrochemical, ammonia and aluminium production; (c) N2O emissions from the production of nitric, adipidic and glyoxylic acids; and (d) PFC emissions from aluminium production. Since 1 January 2012, aviation has also been part of the EU ETS.
Since 2013, these emissions have been calculated by the plant operators that fall under the ETS obligations in line with Regulation No 601/2012, whereas in Phase II of the EU ETS (2008-2012), the monitoring and reporting of the operators was based on Commission Decision 2004/156/EU.
Croatia entered the EU ETS Scheme on 1 January 2013.
Approximated greenhouse gas inventory
Finally, whenever relevant, this indicator uses data and estimates from the 'Approximated GHG inventory' for the year (X-1). These 'proxy' inventories are reported by Member States to the EEA and to the Commission under the MMR by 31 July of each year, X, and are calculated at an aggregated level on the basis of the national and international information available for the year (X-1).
Greenhouse gas inventories (years 1990-(X-2)):
The historic emission data presented in the indicator are based on the information reported by Member States under the MMR. However, should a Member State not submit the inventory data required to compile the EU inventory, the Commission shall prepare estimates to complete the GHG inventories submitted by Member States in consultation and close cooperation with the Member States concerned. In this case, the Member State shall use the gap-filled inventory in its official submission to the UNFCCC. The basis for these gap-filling processes is described in the Commission Delegated Regulation of 12.03.2014 (http://ec.europa.eu/clima/policies/g-gas/monitoring/docs/c_2014_1539_en.pdf )
Approximated greenhouse gas inventory (year X-1):
Under the MMR, the Commission shall also estimate a Member State’s approximated GHG inventory if the Member State does not provide it. These estimates are provided by the EEA and are country-specific. More information on the methodology used for gap-filling is provided in the 'Approximated GHG inventory report' of each year.
Projected greenhouse gas emissions (year X–2035):
In order to ensure the timeliness, completeness, consistency, comparability, accuracy and transparency of the reporting of projections by the EU and its Member States, the quality of the reported projections is assessed by the ETC/ACM on behalf of the EEA. As the Member States' reporting of projections is carried out every 2 years by countries, in certain cases, projections are adjusted to ensure full consistency with historic GHG emission data from the latest GHG inventories. Where a country has not made a submission, data are gap-filled by the ETC/ACM.
Greenhouse gas inventories
(a) Difference in methodologies between countries
Since Member States use different national methodologies, national activity data or country-specific emission factors in accordance with IPCC and UNFCCC guidelines, these different methodologies are reflected in the EU GHG inventory data. The EU believes that it is consistent with the UNFCCC reporting guidelines and the 2006 IPCCC guidelines to use different methodologies for one source category across the EU territory, especially if this helps to reduce the uncertainty and improve the consistency of the emission data, provided that each methodology is consistent with the 2006 IPCC guidelines. At the same time, the EU is making an effort to promote and support the use of higher tier methodologies across Member States. At the EU level, and for most of the key categories of the EU inventory, more than 75 % of the EU-KP emissions are calculated using higher tier methodologies, resulting in lower uncertainty rates.
(b) Global warming potential
According to the IPCC, the GWP values used in the IPCC AR4 have an uncertainty of ±35 % for the 5-95 % (90 %) confidence range.
Projected greenhouse gas emissions
The methodology proposed consists of simple additions of data reported by Member States. However, uncertainty arises from the following:
Several countries carry out sensitivity analyses on their projections.
Approximated greenhouse gas inventory
The uncertainty ranges estimated in the approximated GHG inventories are derived by comparing the official national data submitted to the UNFCCC in year X with the proxy estimates of the same year. The uncertainty for the approximated emissions at the EU level is estimated as the weighted mean of the differences described: weighted again by the relative contribution that each Member State makes to total EU-28 emissions. More details about these methodologies are provided each year in the 'Approximated GHG inventory report'.
The 2006 IPCC Guidelines provide approaches on how Parties should estimate uncertainties, suggesting different values for the uncertainty of activity data and emission factors for most of the emission source categories. On the basis of this guidance, EU Member States and other EEA countries perform their own assessment of the uncertainty of reported data and provide an uncertainty analysis in the National Inventory Report to account for uncertainty per source category, as well as the total uncertainty of their national inventory.
Section (1.7) of the annual EU GHG inventory report considers the uncertainty evaluation, describing the methodology used to estimate it. The results suggest that the uncertainty level in the EU is about 6 % for total GHG emissions (including LULUCF).
Total EU-28 GHG emission trends are likely to be more accurate than individual absolute annual emission estimates, because the annual values are not independent of each other. The IPCC suggests that the uncertainty in total GHG emission trends is approximately 4-5 %. For the EU, the trend uncertainty is estimated to be close to 1 %. Total GHG emission estimates are quite reliable and the limited number of interpolations used to build the indicator do not introduce much uncertainty at the EU level.
Uncertainties in the projections of GHG emissions can be significant but have not been assessed.
The IPCC AR4 (IPCC Fourth Assessment Report 'Climate Change 2007') emphasises that:
Words in bold represent calibrated expressions of uncertainty and confidence. Relevant terms are explained in the Box 'Treatment of uncertainty' in the introduction to the AR4 Synthesis Report. In particular, 'very likely' corresponds to a probability of occurrence higher than 90 %. This uncertainty in specific outcomes is assessed using expert judgment and statistical analysis of a body of evidence (e.g. observations or model results).
The high confidence in the responsibility of anthropogenic GHG emissions for the warming of the climate system re-emphasises the relevance of monitoring and assessing GHG emissions trends in Europe.
For references, please go to https://eea.europa.eu./data-and-maps/indicators/greenhouse-gas-emission-trends-6/assessment or scan the QR code.
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