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CO2削減プロジェクト86種類と飛行機に荷物を搭載しない効果との比較

CO2削減プロジェクト86種類と飛行機に荷物を搭載しない効果との比較

 

目次

1:「Project Drawdown」とは

2:1人当たり1日当たりのCO2排出量の削減効果比較

3:1人当たり1年間当たりのCO2排出量の削減効果比較

Stop climate change

1:「Project Drawdown」とは

このデータを見てもまだ荷物を飛行機に持ち込みますか?」では、主に日本の環境省のデータを用いて1人1日当たりのCO2排出量削減比較を行いました。今回は「Project Drawdown」のデータを用いて、より多くのCO2排出量削減効果との比較を行います。

「Project Drawdown」では、190人の研究者・専門家・科学者の国際的なグループが結集し、気候変動に対する現実的かつ大胆な解決策をまとめ、「Drawdown: The Most Comprehensive Plan Ever Proposed to Reverse Global Warming(邦題:DRAWDOWNドローダウン― 地球温暖化を逆転させる100の方法)」という本を出版しました。世界をリードする科学者と政策立案者の綿密な調査に基づき2020年から2050年までの解決策を網羅した本として、世界中で高く評価されています。

「Project Drawdown」の最新データは「https://drawdown.org」で見ることができます。当社ではこの最新データを用いて、日本旅行時の飛行機への20kg荷物搭載を止めた場合に得られるCO2排出量削減効果を、同書が提案する気候変動の各対策と比較しました。当社が使用したデータはScenario 1です。Scenario 1とは2100年までに気温上昇を2度に抑えるシナリオです。「Project Drawdown」には1.5度までに気温上昇を抑えるScenario 2も併記されています。

 

CO2排出量の削減効果(Drawdown Scenario 1 and 2)

SOLUTIONSECTOR(S)SCENARIO 1SCENARIO 2
Gigatons CO2 Equivalent Reduced / Sequestered (2020–2050)
1Reduced Food WasteFood, Agriculture, and Land Use / Land Sinks88.5102.2
2Plant-Rich DietsFood, Agriculture, and Land Use / Land Sinks78.3103.1
3Family Planning and EducationHealth and Education68.968.9
4Refrigerant ManagementIndustry / Buildings57.257.2
5Tropical Forest RestorationLand Sinks54.585.1
6Onshore Wind TurbinesElectricity47.0143.6
7Alternative RefrigerantsIndustry / Buildings42.748.8
8Utility-Scale Solar PhotovoltaicsElectricity40.8111.6
9Clean CookingBuildings31.476.3
10Distributed Solar PhotovoltaicsElectricity26.764.9
11SilvopastureLand Sinks26.642.3
12Methane Leak ManagementOther Energy25.831.3
13Peatland Protection and RewettingFood, Agriculture, and Land Use / Land Sinks25.440.3
14Tree Plantations (on Degraded Land)Land Sinks22.035.1
15Temperate Forest RestorationLand Sinks19.427.9
16Concentrated Solar PowerElectricity18.021.5
17Perennial Staple CropsLand Sinks16.332.9
18InsulationElectricity / Buildings15.418.5
19Regenerative Annual CroppingFood, Agriculture, and Land Use / Land Sinks15.123.2
20Tree IntercroppingLand Sinks15.024.4
21LED LightingElectricity14.515.7
22Managed GrazingLand Sinks13.720.9
23Multistrata AgroforestryLand Sinks13.323.9
24Conservation AgricultureFood, Agriculture, and Land Use / Land Sinks12.88.1
25Abandoned Farmland RestorationLand Sinks12.520.3
26RecyclingIndustry10.411.3
27Offshore Wind TurbinesElectricity10.29.9
28Improved Rice ProductionFood, Agriculture, and Land Use / Land Sinks9.914.4
29Building Automation SystemsElectricity / Buildings9.614.0
30Public TransitTransportation9.415.4
31Efficient TrucksTransportation9.210.8
32CarpoolingTransportation9.111.1
33High-Performance GlassElectricity / Buildings8.811.3
34Indigenous Peoples’ Forest TenureFood, Agriculture, and Land Use / Land Sinks8.712.5
35Bamboo ProductionLand Sinks7.719.6
36Alternative CementIndustry7.715.6
37Electric CarsTransportation7.79.8
38Smart ThermostatsElectricity / Buildings6.97.3
39Efficient Ocean ShippingTransportation6.79.8
40Waste to EnergyElectricity / Industry6.35.2
41District HeatingElectricity / Buildings6.29.7
42Geothermal PowerElectricity6.29.2
43Methane DigestersElectricity / Industry6.07.1
44Forest ProtectionFood, Agriculture, and Land Use / Land Sinks5.68.8
45Efficient AviationTransportation5.35.8
46Biogas for CookingBuildings4.79.7
47Improved Cattle FeedFood, Agriculture, and Land Use4.415.1
48Recycled MetalsIndustry4.312.3
49High-Efficiency Heat PumpsElectricity / Buildings4.09.1
50Perennial Biomass ProductionLand Sinks4.07.0
51Seafloor ProtectionFood, Agriculture, and Land Use3.85.1
52Reduced PlasticsIndustry3.85.4
53Solar Hot WaterElectricity / Buildings3.413.7
54Grassland ProtectionFood, Agriculture, and Land Use / Land Sinks3.44.3
55Improved Manure ManagementFood, Agriculture, and Land Use3.36.1
56Nuclear PowerElectricity3.23.6
57System of Rice IntensificationFood, Agriculture, and Land Use / Land Sinks2.94.4
58Walkable CitiesTransportation2.83.5
59Nutrient ManagementFood, Agriculture, and Land Use2.811.5
60Bicycle InfrastructureTransportation2.74.6
61TelepresenceTransportation2.64.4
62Biomass PowerElectricity2.63.6
63Macroalgae Protection and RestorationCoastal and Ocean Sinks2.63.8
64Seaweed FarmingCoastal and Ocean Sinks / Coastal and Ocean Sinks2.54.7
65Recycled PaperIndustry2.32.9
66Electric TrainsTransportation1.93.3
67Small HydropowerElectricity1.73.2
68Hybrid CarsTransportation1.64.7
69Electric BicyclesTransportation1.41.6
70Biochar ProductionEngineered Sinks1.43.0
71Sustainable Intensification for SmallholdersFood, Agriculture, and Land Use / Land Sinks1.40.7
72BioplasticsIndustry1.32.5
73Ocean PowerElectricity1.30.8
74High-Speed RailTransportation1.33.6
75Coastal Wetland ProtectionFood, Agriculture, and Land Use / Coastal and Ocean Sinks1.21.6
76Farm Irrigation EfficiencyFood, Agriculture, and Land Use1.12.1
77CompostingIndustry1.11.4
78Improved FisheriesFood, Agriculture, and Land Use / Coastal and Ocean Sinks1.01.5
79Low-Flow FixturesElectricity / Buildings0.91.5
80Coastal Wetland RestorationCoastal and Ocean Sinks0.81.0
81Water Distribution EfficiencyElectricity0.60.9
82Green and Cool RoofsElectricity / Buildings0.51.0
83Recycled PlasticsIndustry0.51.7
84Improved AquacultureFood, Agriculture, and Land Use0.50.8
85Dynamic GlassElectricity / Buildings0.30.5
86Micro Wind TurbinesElectricity0.10.1
Total1,047.01,638.7

出所:Project Drawdown

 

forest fire (on a mountain)

 

2:1人当たり1日当たりのCO2排出量の削減効果比較

「Project Drawdown」の1人当たりCO2排出量削減効果を計算するにあたり、2020年時点の世界人口(78.2億人)、OECDの人口(13.7億人)、High income国の人口(12.4億人)の3パターンを使用しました。OECDの人口やHigh income国の人口を使用したのは、世界のCO2排出量は先進国がより多いため、その削減余地も先進国が大きいと考えるためです。なお、2019年データでは世界のCO2排出量に占める割合はOECDが34%、High income国が35%です。

「Project Drawdown」に記載されているCO2削減プロジェクト86種類(Scenario 1のデータ)を1人1日当たりのCO2削減量として計算すると、最大の削減効果は「Reduced Food Waste(食品ロス削減)」、2番目に大きな効果は「Plant-Rich Diets(植物性食品を多く含む食事)」でした。「Reduced Food Waste(食品ロス削減)」の1日当たりCO2排出量の削減効果は、世界人口の1人当たり1.0kg、OECD人口の1人当たり5.9kg、High income国人口の1人当たり6.5kgとなります。

Food waste

「このデータを見てもまだ荷物を飛行機に持ち込みますか?」で分析したように、日本旅行時の飛行機への20kg荷物搭載を止めた場合のCO2排出量削減効果(世界19か国からの片道平均)は74.5kgです。これは「Project Drawdown」に記載されたあらゆるCO2排出量の削減効果と比較し10倍以上の効果となります。

 

1人当たり1日当たりのCO2排出量の削減効果 (kg)

SOLUTIONWorld populationOECD polurationHigh income population
Reduced 20kg luggage (One way to Japan)74.5074.5074.50
Reduced Food Waste1.035.906.51
Plant-Rich Diets0.915.225.76
Family Planning and Education0.804.595.07
Refrigerant Management0.673.814.21
Tropical Forest Restoration0.643.634.01
Onshore Wind Turbines0.553.133.46
Alternative Refrigerants0.502.853.14
Utility-Scale Solar Photovoltaics0.482.723.00
Clean Cooking0.372.092.31
Distributed Solar Photovoltaics0.311.781.96
Silvopasture0.311.771.96
Methane Leak Management0.301.721.90
Peatland Protection and Rewetting0.301.691.87
Tree Plantations (on Degraded Land)0.261.471.62
Temperate Forest Restoration0.231.291.43
Concentrated Solar Power0.211.201.32
Perennial Staple Crops0.191.091.20
Insulation0.181.031.13
Regenerative Annual Cropping0.181.011.11
Tree Intercropping0.181.001.11
LED Lighting0.170.961.06
Managed Grazing0.160.911.01
Multistrata Agroforestry0.150.880.98
Conservation Agriculture0.150.850.94
Abandoned Farmland Restoration0.150.830.92
Recycling0.120.690.76
Offshore Wind Turbines0.120.680.75
Improved Rice Production0.120.660.72
Building Automation Systems0.110.640.70
Public Transit0.110.630.69
Efficient Trucks0.110.610.67
Carpooling0.110.600.67
High-Performance Glass0.100.590.65
Indigenous Peoples’ Forest Tenure0.100.580.64
Bamboo Production0.090.510.57
Alternative Cement0.090.510.57
Electric Cars0.090.510.56
Smart Thermostats0.080.460.51
Efficient Ocean Shipping0.080.450.49
Waste to Energy0.070.420.46
District Heating0.070.410.45
Geothermal Power0.070.410.45
Methane Digesters0.070.400.44
Forest Protection0.060.370.41
Efficient Aviation0.060.350.39
Biogas for Cooking0.050.310.34
Improved Cattle Feed0.050.290.33
Recycled Metals0.050.290.32
High-Efficiency Heat Pumps0.050.270.30
Perennial Biomass Production0.050.270.29
Seafloor Protection0.040.250.28
Reduced Plastics0.040.250.28
Solar Hot Water0.040.230.25
Grassland Protection0.040.220.25
Improved Manure Management0.040.220.25
Nuclear Power0.040.210.23
System of Rice Intensification0.030.190.21
Walkable Cities0.030.190.21
Nutrient Management0.030.180.20
Bicycle Infrastructure0.030.180.20
Telepresence0.030.180.19
Biomass Power0.030.170.19
Macroalgae Protection and Restoration0.030.170.19
Seaweed Farming0.030.170.18
Recycled Paper0.030.150.17
Electric Trains0.020.130.14
Small Hydropower0.020.110.12
Hybrid Cars0.020.110.12
Electric Bicycles0.020.090.10
Biochar Production0.020.090.10
Sustainable Intensification for Smallholders0.020.090.10
Bioplastics0.020.090.10
Ocean Power0.010.080.09
High-Speed Rail0.010.080.09
Coastal Wetland Protection0.010.080.09
Farm Irrigation Efficiency0.010.080.08
Composting0.010.080.08
Improved Fisheries0.010.070.07
Low-Flow Fixtures0.010.060.07
Coastal Wetland Restoration0.010.050.06
Water Distribution Efficiency0.010.040.04
Green and Cool Roofs0.010.040.04
Recycled Plastics0.010.030.04
Improved Aquaculture0.010.030.04
Dynamic Glass0.0040.020.03
Micro Wind Turbines0.0010.010.01

出所:Project Drawdown、観光庁、WorldometerWorld Bank Data、ECTA、当社計算

注:Project DrawdownのScenario 1により計算

 

Daily-CO2-emissions-reduction-per-capita

出所:Project Drawdown、観光庁、WorldometerWorld Bank Data、ECTA、当社計算

注:一人当たり削減量はProject DrawdownのScenario 1、High income国の人口により計算、「Reduced 20kg luggage」は日本旅行における飛行機に20kgの荷物搭載を止めた場合のCO2排出量の削減効果(世界19か国からの片道平均)

 

3:1人当たり1年間当たりのCO2排出量の削減効果比較

日本の観光庁の「訪日外国人の消費動向(2019年)」 によれば、1年間当たりの外国人の訪日回数は平均1.8回でした。世界19ヵ国からの飛行距離・訪日客数・1年間当たりの訪日回数で計算すると、1人の旅行者が20kgの荷物を飛行機に搭載しないことで得られる1年間当たり(平均1.8回)のCO2排出量の削減効果は137kgとなりました。

 

1人当たり1年間当たりのCO2排出量の削減効果 (kg)

SOLUTIONWorld populationOECD polurationHigh income population
1Reduced Food Waste377.22,152.92,377.3
2Plant-Rich Diets333.81,905.52,104.1
3Family Planning and Education293.71,676.11,850.8
4Refrigerant Management243.61,390.31,535.2
5Tropical Forest Restoration232.11,324.61,462.6
6Onshore Wind Turbines200.11,142.11,261.2
7Alternative Refrigerants182.11,039.51,147.8
8Utility-Scale Solar Photovoltaics174.0993.31,096.8
Reduced 20kg luggage (1.8 round-trip to Japan)136.6
9Clean Cooking133.7763.4842.9
10Distributed Solar Photovoltaics113.6648.3715.9
11Silvopasture113.3646.6714.0
12Methane Leak Management110.1628.4693.9
13Peatland Protection and Rewetting108.3617.9682.3
14Tree Plantations (on Degraded Land)93.9536.2592.0
15Temperate Forest Restoration82.8472.4521.7
16Concentrated Solar Power76.7437.9483.5
17Perennial Staple Crops69.6397.5438.9
18Insulation65.6374.1413.1
19Regenerative Annual Cropping64.4367.8406.2
20Tree Intercropping64.1365.6403.7
21LED Lighting61.6351.5388.2
22Managed Grazing58.5333.8368.5
23Multistrata Agroforestry56.5322.6356.2
24Conservation Agriculture54.6311.6344.1
25Abandoned Farmland Restoration53.2303.6335.2
26Recycling44.2252.0278.3
27Offshore Wind Turbines43.6248.6274.5
28Improved Rice Production42.0239.6264.6
29Building Automation Systems40.7232.3256.5
30Public Transit40.1229.2253.0
31Efficient Trucks39.0222.6245.8
32Carpooling38.6220.4243.4
33High-Performance Glass37.6214.6236.9
34Indigenous Peoples’ Forest Tenure37.0211.4233.4
35Bamboo Production32.8187.3206.8
36Alternative Cement32.8187.3206.8
37Electric Cars32.6186.3205.8
38Smart Thermostats29.5168.1185.6
39Efficient Ocean Shipping28.6163.5180.5
40Waste to Energy26.7152.5168.4
41District Heating26.3150.3166.0
42Geothermal Power26.2149.6165.2
43Methane Digesters25.7146.4161.7
Reduced 20kg luggage (1.8 round-trip to Japan)136.6
44Forest Protection23.7135.0149.1
45Efficient Aviation22.5128.7142.1
Reduced 20kg luggage (1.8 round-trip to Japan)136.6
46Biogas for Cooking19.8113.1124.9
47Improved Cattle Feed18.8107.5118.7
48Recycled Metals18.4104.8115.8
49High-Efficiency Heat Pumps17.298.3108.5
50Perennial Biomass Production17.097.3107.4
51Seafloor Protection16.292.4102.1
52Reduced Plastics16.091.5101.0
53Solar Hot Water14.583.091.6
54Grassland Protection14.381.590.0
55Improved Manure Management14.281.389.7
56Nuclear Power13.577.185.2
57System of Rice Intensification12.470.577.9
58Walkable Cities12.168.876.0
59Nutrient Management11.867.474.4
60Bicycle Infrastructure11.666.473.3
61Telepresence11.364.270.9
62Biomass Power11.263.770.4
63Macroalgae Protection and Restoration11.163.570.1
64Seaweed Farming10.760.867.2
65Recycled Paper9.755.561.2
66Electric Trains8.146.551.3
67Small Hydropower7.040.144.3
68Hybrid Cars6.939.243.2
69Electric Bicycles5.933.837.3
70Biochar Production5.833.136.5
71Sustainable Intensification for Smallholders5.833.136.5
72Bioplastics5.732.435.7
73Ocean Power5.430.934.1
74High-Speed Rail5.430.733.8
75Coastal Wetland Protection5.129.232.2
76Farm Irrigation Efficiency4.827.530.4
77Composting4.827.530.4
78Improved Fisheries4.324.627.1
79Low-Flow Fixtures4.022.625.0
80Coastal Wetland Restoration3.218.520.4
81Water Distribution Efficiency2.614.816.4
82Green and Cool Roofs2.312.914.2
83Recycled Plastics2.212.614.0
84Improved Aquaculture2.112.213.4
85Dynamic Glass1.48.39.1
86Micro Wind Turbines0.42.22.4

出所:Project Drawdown、観光庁、WorldometerWorld Bank Data、ECTA、当社計算

注:Project DrawdownのScenario 1により計算

 

Annual CO2 emissions reduction per capita

注:一人当たり削減量はProject DrawdownのScenario 1、世界人口により計算、「Reduced 20kg luggage」は日本旅行における飛行機に20kgの荷物搭載を止めた場合のCO2排出量の削減効果(世界19か国からの片道平均)

 

この削減効果137kgを「Project Drawdown」が提案するCO2削減プロジェクト86種類の効果と比較すると、世界人口当たりでは9番目、OECDの人口当たりでは44番目、High income国の人口当たりでは46番目の効果となりました。世界の科学者が厳選した「地球温暖化を逆転させる100の方法」の中でもかなり良い順位です。飛行機への搭載荷物削減効果は、極めて大きいと言えるのではないでしょうか。

しかも「Project Drawdown」には、未完成の技術などを利用した上での2050年までのCO2削減効果も含まれています。飛行機への搭載荷物削減は今すぐできる施策です。更に飛行機への搭載荷物削減により、荷物の準備・運搬・衣類の洗濯・片付けが不要になります。また、高齢者や障害者、子連れ家族など移動困難者が旅行をしやすくなるため、トラベルディバイドを解消できます。良いこと尽くしの飛行機への搭載荷物削減を、すぐにでも実行しようではありませんか。

heavy luggage

 

 

 

 

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