Greenhouse effect
Methane
Water Vapour
Sulfur Hexafluoride
Carbon Dioxide
Emission from anaerobic decomposition in natural wetlands
Emissions from paddy rice fields
Emission from livestock production systems (including intrinsic fermentation and animal waste)
Biomass burning (including forest fires, charcoal combustion, and firewood burning)
Burning hydrocarbon fuels (wood, coal, natural gas, gasoline and oil)
Emissions from anaerobic decomposition of organic waste in landfills
Fossil methane emission during the exploration and transport of fossil fuels
Deforestation
Consuming electricity
Industrial manufactoring
Volcano Eruptions
Natural gas systems and coal mines are the major sources of methane emissions in the energy sector
Landscape changes
Animals also produces methane emissions, and digestion by cattle accounts
Decomosition and respiration of organisms
It is used for plasma etching prior to chemical vapor deposition (CVD)
Nitride etching
Oxide etching
Wafer cleaning
Transportation
Reactive fluorine ions
Evaporation from the oceans
Power plant cooling
Irrigation
It is produced by the evaporation or boiling of liquid water
It is used for transport systems
It is really important to humans for cooking
It is a major component in energy production
Specialized medical procedures
dielectric materials, especially dielectric liquids
Reference: Color pink is for natural emissions
Nitrous Oxide
Agricultural and industrial activities
Combustion of fossil fuels
Solid waste
Treatment of wastewater
Fertilizer for soil
It comes from byproduct of the production of chemicals like nitric acid (used for fertilizer) or adipic acid (used to make nylon and other synthetic products).
Used for aneathetic effects
Soils under natural vegetation
One of the sources is Tundra
It comes form the oceans