Energy savings


Energy efficiency improvements reduce the amount of energy use required to provide a service. Energy savings are at the heart of the multiple benefits of energy efficiency and link to many other economic, social and environmental benefits.

Energy efficiency reduces energy use worldwide

Globally, energy efficiency improved by an estimated 13% between 2000 and 2017. Without this improvement, global energy use in 2017 would have been 12% higher – equivalent to adding the annual final energy use of the European Union to the global energy market (Figure 1). In the world’s major economies, the majority of these savings were obtained in the industry and buildings sectors.  

	Actual	Without energy efficiency	GDP
2000	100	100	100
2001	100.4996395	100.8323348	102.3798011
2002	101.9881507	102.8352067	105.3428466
2003	105.0629168	106.428762	109.625601
2004	109.6552556	111.4468825	115.3548141
2005	113.170989	114.9773594	120.8470414
2006	115.8925029	120.1475336	127.2599593
2007	119.1946641	125.2316421	134.1268484
2008	121.0425425	128.4562303	137.9861216
2009	119.6444134	126.877124	137.3650489
2010	125.8768522	132.7659428	144.5926035
2011	127.8104021	135.9815191	150.5297701
2012	129.0402082	138.2190191	155.4899051
2013	131.6555882	141.7971036	160.7214955
2014	132.480508	143.8646807	166.3138612
2015	133.8102898	146.5703274	171.8429952
2016	135.6131516	150.1748713	177.2039716
2017	137.9878634	153.8661794	183.7214644


{
                          "title": {
                            "text": "Energy demand with and without efficiency and GDP"
                          },
                          "chart": {
                            "type": "line",
                            "height": "40%"
                          },
                          "yAxis": {
                            "min": 100,
                            "title": {
                              "text": "(index, 2000=100)"
                            }
                          },
                          "xAxis": {
                              "plotBands": [
                                {
                                  "from": 2000,
                                  "to": 2017,
                                  "color": "#fafafa",
                                  "label": {
                                    "text": "Historical"
                                  }
                                }
                              ]
                            },
                          "legend": {
                            "align": "right",
                            "verticalAlign": "middle",
                            "layout": "vertical"
                          },
                          "plotOptions": {
                            "series": {
                              "zoneAxis": "x",
                              "zones": [{
                                "value": 2017
                              },
                              {
                                "dashStyle": "Dot"
                              }],
                              "marker": {
                                "enabled": false
                              },
                              "tooltip": {
                                "valueDecimals": 1,
                                "valueSuffix": " (2000=100)"
                              }
                            }
                          }
                      }
	
	Industry	Transport	Buildings
2000	0.0	0.0	0.0
2001	-0.2	0.3	0.6
2002	0.5	0.6	1.2
2003	1.0	0.4	1.8
2004	0.8	0.6	2.5
2005	-0.7	1.3	3.0
2006	3.7	1.8	4.0
2007	7.4	1.6	4.8
2008	9.5	2.0	5.6
2009	7.2	2.5	6.6
2010	4.6	3.1	7.5
2011	6.4	3.6	8.4
2012	7.2	3.8	9.4
2013	8.2	4.3	10.2
2014	10.6	4.0	10.9
2015	13.1	3.8	12.0
2016	15.8	4.4	13.1
2017	18.5	4.2	13.9


{
   "title": {
       "text": "Efficiency-related energy savings by sector"
    },
    "chart": {
       "type": "column",
"height": "40%" }, "plotOptions": { "column": { "stacking": "normal", "grouping": "true" } }, "tooltip": { "valueDecimals": 0, "valueSuffix": " EJ" }, "yAxis": [ { "title": { "text": "EJ" }, "labels": { "format": "{value} EJ" } } ] }

Notes: Major economies are IEA countries plus China, India, Brazil, Indonesia, Russian Federation, South Africa and Argentina. Global energy savings are a combination of improvements in major economies, plus the rest of the world, which represents 25% of global energy use. Energy savings for the rest of the world are estimated by applying the ratio of efficiency improvements to intensity gains observed in emerging economies to the gains in intensity observed in these other countries.

Energy efficiency reduces the need for additional primary energy

The estimated amount of primary energy saved in major economies in 2017 as a result of efficiency gains since 2000 was over 50 EJ. Of these primary energy savings, around 40% came from reduced fuel input to power generation due to reductions in electricity demand. Coal is the largest source of global primary energy savings, as a result of efficiency gains in China. These coal savings are equivalent to over 10% of global coal demand. Natural gas savings were also around 10% of global demand.

Figure 2. Avoided energy use in 2017 from efficiency improvements since 2000, by fuel 2000-17[2]

 ES2

Note: Major economies are IEA countries plus China, India, Brazil, Indonesia, Russian Federation, South Africa and Argentina. Primary energy savings from power generation are determined based on the generation mix within the countries analysed.

 


[1] IEA, Energy Efficiency Market Report 2018.

[2] IEA, Energy Efficiency Market Report 2018.

More about energy efficiency at the IEA