The following table includes the 100-year time horizon global warming potentials (GWP) relative to CO2. This table is adapted from the IPCC Fifth Assessment Report, 2014 (AR5)i.

Tetrafluoromethane, also known as carbon tetrafluoride or R-14, is the simplest perfluorocarbon (C F 4). As its IUPAC name indicates, tetrafluoromethane is the perfluorinated counterpart to the hydrocarbon methane. It can also be classified as a haloalkane or halomethane.

2023年2月13日 · Chlorofluorocarbons, or CFCs, make up just four parts per billion of the atmosphere, but they're so efficient at warming the planet that they’re still an important contributor to climate change. February 13, 2023. Carbon dioxide (CO 2) is the most well-known and significant greenhouse gas causing climate change.

Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane, and propane. The most common example is dichlorodifluoromethane (R-12).

Atmospheric CH4 reached 257% of the pre-industrial level (approximately 722 ppb) due to increased emissions from anthropogenic sources. Globally averaged CH4 calculated from in situ observations reached a new high of 1859 ± 2 ppb in 2017, an increase of 7 ppb with respect to the previous year (Figure 5).

CO2 O3 N2O CH4 CFC, What may be an ecological implication of global warming? -In general, plants and animals will probably benefit from warmer temperatures. -Plants and animals will adjust quickly to the changes in temperature and begin to replicate and reproduces in new areas.

2018年10月26日 · CO2, N2O, CH4, CFC.11, CFC.12: atmospheric concentrations of carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4), trichlorofluoromethane (CCl3F; commonly referred to as CFC-11) and dichlorodifluoromethane (CCl2F2; commonly referred to as CFC-12), respectively. This data comes from the ESRL/NOAA Global Monitoring Division.

2025年3月14日 · Measurements of chemical constituents in the atmosphere including the major (non-H2O) greenhouse gases (CO2, CH4, CFC, N2O). Definition source: LibreTexts

全球暖化潜势是温室效应的影响因子之一。其中以 co2 为 1 时，ch4 为 21，也就是你所谓：ch4 比 co2 的温室效应系数强 21 倍。实际上不能称为「温室效应系数」才对。请参考

contributions from methane (CH4) (17%) nitrous oxide (N2O) (4%) and chlorofluorocarbons (CFCs) (12%) Stratospheric water vapour increases, which are expected to result from methane emissions, contribute 6%, although evidence for changes in concentration is based entirely on model calculations