INI

Types of Greenhouse Gases - INI

Greenhouse gases are the collective term for gases that contribute to rising global temperatures. Carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and fluorinated gases (HFCs, PFCs, SF6, etc.) are known as the main types. Each gas is evaluated for its warming impact by the Global Warming Potential (GWP), and they differ in atmospheric lifetime and emission sources. In the International Framework for Climate Change, the IPCC has positioned the reduction of these gas emissions as an important issue.

greenhouse gases global warming carbon dioxide methane nitrous oxide fluorinated gases GWP environment climate change

[item.carbon-dioxide]
code=CO2
slug=carbon-dioxide
name=Carbon Dioxide
description=The most significant greenhouse gas, accounting for approximately 75% of anthropogenic emissions.
atmosphericLifetime=数百〜数千年
emissionShare=約75%
formula=CO₂
gwp100=1
mainSources=["Fossil fuel combustion","Cement production","Deforestation"]

[item.methane]
code=CH4
slug=methane
name=Methane
description=Has approximately 28 times the warming potential of CO₂, accounting for about 18% of anthropogenic emissions.
atmosphericLifetime=約12年
emissionShare=約18%
formula=CH₄
gwp100=27.9
mainSources=["Agriculture (rice, livestock)","Natural gas extraction","Waste landfills"]

[item.nitrous-oxide]
code=N2O
slug=nitrous-oxide
name=Nitrous Oxide
description=Also called laughing gas, with approximately 273 times the warming potential of CO₂.
atmosphericLifetime=約109年
emissionShare=約4%
formula=N₂O
gwp100=273
mainSources=["Nitrogen fertilizer use","Industrial processes","Fuel combustion"]

[item.hydrofluorocarbons]
code=HFC
slug=hydrofluorocarbons
name=Hydrofluorocarbons
description=Fluorinated gases used in refrigerants with hundreds to thousands of times the warming potential.
atmosphericLifetime=数年〜数十年
emissionShare=約1%
formula=HFCs
gwp100=675
mainSources=["Refrigerants for refrigerators and AC","Spray cans","Foaming agents"]

[item.perfluorocarbons]
code=PFC
slug=perfluorocarbons
name=Perfluorocarbons
description=Used in semiconductor manufacturing, extremely long-lived and potent greenhouse gases.
atmosphericLifetime=数千年
emissionShare=0.5%未満
formula=PFCs
gwp100=6500
mainSources=["Semiconductor manufacturing","Aluminum smelting"]

[item.sulfur-hexafluoride]
code=SF6
slug=sulfur-hexafluoride
name=Sulfur Hexafluoride
description=One of the most potent greenhouse gases, with approximately 24,000 times the warming effect of CO₂.
atmosphericLifetime=850〜1,280年
emissionShare=0.1%未満
formula=SF₆
gwp100=24300
mainSources=["High-voltage electrical equipment insulation","Semiconductor manufacturing"]

[item.nitrogen-trifluoride]
code=NF3
slug=nitrogen-trifluoride
name=Nitrogen Trifluoride
description=Used in semiconductor and LCD manufacturing, with approximately 17,000 times the warming potential of CO₂.
atmosphericLifetime=長い（数百年以上）
emissionShare=0.1%未満
formula=NF₃
gwp100=17200
mainSources=["Semiconductor manufacturing","LCD panel manufacturing"]