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Emissions and Labour Productivity

Emissions and Labour Productivity

Electricity, Gas & Steam had the highest Greenhouse Gas emissions per employee in 2021

Online ISSN: 2811-5910
CSO statistical publication, , 11am
COVID-19 Release Information

This release was compiled during the COVID-19 crisis. The results contained in this release reflect some of the economic impacts of the COVID-19 situation. The full series of information notes on the implications of COVID-19 on the National Accounts can be found on our Information Notes page.

This page was updated on 31/01/2024 at 11am to correct an error relating to the units of emissions. This meant that all references to "kilotonnes" have now been corrected to "tonnes".

This chapter is a new addition to the publication and looks at the linkages between Greenhouse Gas Emissions per employee and Labour Productivity. Greenhouse gases contribute to global warming and this chapter shows the impact industrial production has on the environment. Greenhouse Gas emissions per employee are measured as tonnes of carbon dioxide equivalent (t CO2e), divided by total employment, while labour productivity is measured as Gross Value Added (GVA) in constant prices divided by total employment.

The three main gases that make up Greenhouse Gas Emissions referred to in this release are carbon dioxide, nitrous oxide, and methane. Data on Greenhouse Gas emissions are drawn from the CSO publication on Environmental Accounts Air Emissions 20201. Additionally, the two indicators presented here (Greenhouse Gas Emissions and Labour Productivity) are consistent with the National Accounts residence principles2.

1 Estimates for 2021 are taken from the following Eurostat release.

2 More information can be found in the Environmental Accounts Air Emissions 2020 release

Table 5.1 Greenhouse Gas Emissions per Employee (Tonnes of CO2 Equivalent per Employee)
Sector201320142015201620172018201920202021
Agriculture, Forestry & Fishing (A)179.4180.5183.2182.7192.2206.0206.6209.5206.1
Mining & Quarrying (B)12.613.411.215.112.114.120.219.923.6
Manufacturing28.530.530.129.329.630.529.127.327.4
Electricity, Gas & Steam (D)1,112.11,074.21,154.2990.1815.7748.0615.1641.1696.9
Water Supply, Sewerage & Waste Management (E)82.3105.3118.3141.1148.9157.8146.7136.9148.0
Construction (F)2.53.22.62.52.82.73.53.73.9
Wholesale & Retail (G)3.23.23.43.63.43.43.33.33.1
Transportation & Storage (H)152.4152.4154.9179.1204.7208.4195.989.996.9
Accommodation & Food Service Activities (I)2.11.92.01.71.61.31.52.01.8
Information & Communication (J)1.21.11.41.21.10.91.21.21.0
Financial & Insurance Activities (K)0.50.30.40.40.50.50.50.50.5
Real Estate Activities (L)3.33.03.74.62.54.02.51.91.7
Professional, Scientific & Technical Activities (M)1.81.51.61.61.31.11.31.21.0
Administrative & Support Service Activities (N)1.71.61.82.22.01.41.62.01.9
Public Administration & Defence (O)4.74.44.14.44.44.14.64.43.9
Education (P)1.81.61.71.81.81.81.61.61.3
Human Health & Social Work (Q)1.41.31.41.41.51.51.41.41.2
Arts, Entertainment & Recreation (R)2.52.32.22.02.12.72.43.12.8
Other Service Activities (S)2.32.22.13.03.03.12.52.72.6
Total Economy28.027.527.828.929.429.127.522.722.8

Table 5.1 shows Greenhouse Gas Emissions per employee across the 21 sectors of the economy3. Agriculture had the second highest greenhouse gas emissions per employee in 2021 but accounted for the largest proportion of greenhouse gas emissions of any sector. This is primarily due to the large cattle herd in Ireland.

Electricity, Gas & Steam had consistently the highest emissions, when measured on a per employee basis at over 1,000t CO2e per employee between 2013 and 2015 before dropping to 697t CO2e per employee in 2021. Electricity, Gas & Steam also accounted for 17% of greenhouse gas emissions from all NACE activities in 2021. It is important to note these emissions are related to the power generated for use across all sectors of the economy, in particular Manufacturing and Information & Communications (ICT). Similarly, for Water Supply, Sewerage & Waste Management the emissions recorded relate to services such as incineration which are provided to sectors across the economy. 

Emissions per employee in the Transportation & Storage sector, which is dominated by air and road transport, ranged between 150-210t CO2e per employee over the period, before dropping to 97t CO2e per employee in 2021. The decline in emissions per employee in 2020 and 2021 in the sector was due to the COVID-19 pandemic, when airlines were grounded and hence emissions were reduced. Prior to 2020, emissions in the Transportation & Storage sector accounted for 32% of total emissions (excluding households), before falling to 17% in 2020.

3 This excludes emissions by households as reported in Table 1 of the Environmental Accounts Air Emissions 2020 release.

X-axis labelManufacturing Electricity, Gas & Steam (D)Transportation & Storage (H)Information & Communication (J)Agriculture, Forestry & Fishing (A)
2013197497.49297888229818.04273412759144.4256216287191262.3426196117664.3515037022
2014216068.256571961258669.51566167359643.4091605778211443.90289839623153.5799350873
2015379276.813043547264728.1860544260798.7585337731236705.77223370924188.7434846734
2016350756.44492428219030.76840156261162.2985589303243000.45911945725872.0596894944
2017359018.649330144214527.01947711562859.4339208318291300.66125575727923.1145059092
2018404358.339835086238261.88782483962985.1288265306358200.26567732425449.5017322996
2019404145.80719735223409.7283822861408.1899747788411171.08427993533290.7998698264
2020484946.549505047252376.94896008735771.5952008604456916.71013000933902.51367685
2021556169.447834449178459.62160157432124.6249008737470180.12625169832500.7785701784

Get the data: PxStat PIA15

X-axis labelManufacturing Electricity, Gas & Steam (D)Transportation & Storage (H)Information & Communication (J)Agriculture, Forestry & Fishing (A)
201328.52086602691751112.05909275766152.4257213726391.22181256649073179.420405216383
201430.52194039374451074.24267203174152.4463683953461.1136056345818180.519208744114
201530.11968282606761154.17261157967154.9479417728641.35489408324223183.173415768639
201629.2703958325444990.089007515816179.1138915273861.18241996418535182.742810840223
201729.5933043737979815.696141847495204.7232937769981.08227324788918192.192989550913
201830.4822031442088747.963043496371208.3806578999210.949792076085729205.953007540251
201929.1202185671003615.073790233802195.8629729253871.24985905340034206.626766330711
202027.3062279924706641.05942655106289.93998690843151.16997671630042209.53066765225
202127.4112867468119696.86927986409796.90384570212710.989077420212355206.087994628417

Get the data: Environmental Accounts Air Emissions 2020

The two charts above show GVA per Employee4 versus Greenhouse Gas emissions per employee over the period 2013 to 2021. Among the sectors shown, Manufacturing had the highest GVA per Employee at close to €400,000 per employee from 2015 onwards, however the sector had one of the lowest greenhouse gas emissions per employee for much of the same period at under 30t CO2e per employee. The Manufacturing sector is dominated largely by companies involved in the production of pharmaceutical, electronic & optical products. These sectors generate enormous amounts of GVA, however the associated emissions on a per employee basis are not particularly significant. These sectors rely heavily on electricity for production and the related emissions are recorded in the Electricity, Gas & Steam sector.

The Electricity, Gas & Steam sector produced the highest emissions per employee, although they have fallen from 1,112t CO2e per employee in 2013 to 697t CO2e per employee in 2021, with the increased use of renewables. However, the GVA per employee was below Manufacturing and ICT at between €178,000 and €270,000 per employee. While this sector is quite productive, it is still one of the biggest emitting sectors, due to fossil fuels used in the power generation process.

Among the sectors shown, Agriculture was one of the least productive sectors over the nine-year period at under €35,000 per employee. However, the sector was one of the largest emitters of Greenhouse Gases averaging 194t CO2e per employee. This is mainly due to the large cattle herd in Ireland.

The Transportation & Storage sector was the worst impacted by the COVID-19 pandemic. The level of labour productivity halved from €61,000 per employee in 2019 to €36,000 in 2020. There was a corresponding fall in emissions per employee from 196t CO2e in 2019 to 90t CO2e in 2020.

Despite the rapid increase in GVA per employee over the period, there has not been a corresponding increase in emissions in the ICT sector. ICT emissions per employee remained at between 1 to 2t CO2e, while GVA per employee as presented in Figure 5.1 has been trending upwards since 2017 reaching €470,000 in 2021. This increase has been driven by imports of intellectual property products.

4 GVA used in these calculations is the chain linked constant price estimates from the Annual National Accounts 2021.

X-axis labelElectricity Emissions excluding Data centersData Centers
201594.97560975609765.02439024390244
201694.17494873008365.82505126991639
201793.17784256559776.82215743440233
201891.87429854096528.12570145903479
201990.65082059988689.34917940011319
202085.992422647863614.0075773521364
202185.992422647863614.0075773521364

Get the data: Environmental Accounts Air Emissions 2020 and Data Centres Metered Electricity Consumption 2020

Figure 5.3 shows estimated emissions from data centres as a percentage of total emissions in the Electricity, Gas & Steam sector. Data centres are constructed to house computer systems and servers and are an increasingly significant feature of the ICT sector. They are large consumers of electricity, however similar to the Manufacturing sector, a large proportion of the emissions associated with them are assigned to the Electricity, Gas & Steam sector. In line with the development of additional data centres since 2015, the related emissions have been increasing steadily in the period, rising from 5% in 2015 to 14% in 2021.

X-axis labelEU CountriesEU AverageIreland
Ireland0022.7577194480726
Denmark21.48471586025300
Czechia17.680495824706800
Luxembourg17.633629878287400
Belgium16.611660556012100
Finland16.107901796517600
Netherlands15.594301060559500
EU Average013.69180800424440
Hungary10.67387977426500
Portugal9.7072171810467200
Sweden7.941258931994700

Get the data: Environmental Accounts Air Emissions 2020 (Ireland) and Eurostat

Emissions per employee across a selection of EU countries in 2021 is shown above. Ireland recorded the highest emissions per employee at 23t CO2e in 2021 which was above the EU average of 14t CO2e per employee.

Emissions and Contract Manufacturing

In Environmental Accounts, the approach to recording emissions related to production aligns with the National Accounts recording of the production itself. However, for a more comprehensive view, emissions related to the production by Resident units using contract manufacturers5 abroad are also included and presented here.

The key difference in relation to contract manufacturing abroad (in Ireland) is that the output from this activity is included (excluded) in the Irish national accounts, but not included in the emissions measures for these industries in Ireland. Production abroad by contract manufacturers amounted to €91 billion in 2021. Estimates of Greenhouse Gas emissions more consistent with the National Accounts indicators to take account of this activity abroad are presented below.

5 In these cases the economic owner of the goods being produced is the Irish entity. More information can be found in National Accounts Explained.

X-axis labelManufacturing Emissions Adjusted Manufacturing Emissions
201830.482203143408337.7979318978263
201929.12021855964335.5266666427645
202027.306228000493634.132785000617
202127.411286746811936.4570113732598

Get the data: Environmental Accounts Air Emissions 2020 

Figure 5.5 shows the adjusted emissions per employee which are accounted for in the Manufacturing sector. A result of 27t CO2e per employee was reported when contract manufacturing is not included in the Irish emissions. However, adjusting for contract manufacturing emissions increased to 36t CO2e per employee in 2021.