It is to your great discredit that threats to civilisation are subjects for your feeble amusement..
As is now common with deluded maga apparatchiks, ignorance and mindless tribal loyalty win over reality every time...
"..
Methane (CH4) is the second most important greenhouse gas. CH4 is more potent than CO2 because the
radiative forcing produced per molecule is greater. In addition, the
infrared window is less saturated in the range of
wavelengths of radiation absorbed by CH4, so more
molecules may fill in the region. However, CH4 exists in far lower concentrations than CO2 in the
atmosphere, and its concentrations by volume in the atmosphere are generally measured in parts per billion (ppb) rather than ppm. CH4 also has a considerably shorter residence time in the atmosphere than CO2 (the residence time for CH4 is roughly 10 years, compared with hundreds of years for CO2).
Natural sources of methane include tropical and northern
wetlands, methane-oxidizing
bacteria that feed on organic material
consumed by
termites,
volcanoes, seepage vents of the seafloor in regions rich with organic sediment, and methane
hydrates trapped along the
continental shelves of the oceans and in polar
permafrost. The primary natural sink for methane is the atmosphere itself, as methane reacts readily with the
hydroxyl radical (OH−) within the
troposphere to form CO2 and water vapour (H2O). When CH4 reaches the
stratosphere, it is destroyed. Another natural sink is soil, where methane is
oxidized by bacteria.
As with CO2, human activity is increasing the CH4 concentration faster than it can be offset by natural sinks.
Anthropogenic sources currently account for approximately 70 percent of total annual emissions, leading to substantial increases in concentration over time. The major anthropogenic sources of atmospheric CH4 are
rice cultivation,
livestock farming, the burning of
coal and
natural gas, the
combustion of
biomass, and the decomposition of organic matter in landfills. Future trends are particularly difficult to anticipate. This is in part due to an incomplete understanding of the
climate feedbacks associated with CH4 emissions. In addition, as human
populations grow, it is difficult to predict how possible changes in livestock raising, rice cultivation, and
energy use will influence CH4 emissions.
It is believed that a sudden increase in the concentration of methane in the atmosphere was responsible for a warming event that raised average global temperatures by 4–8 °C (7.2–14.4 °F) over a few thousand years during the so-called
Paleocene-Eocene Thermal Maximum (PETM). This episode took place roughly 55 million years ago, and the rise in CH4 appears to have been related to a massive
volcanic eruption that interacted with methane-containing flood deposits. As a result, large amounts of gaseous CH4 were injected into the atmosphere. It is difficult to know precisely how high these concentrations were or how long they persisted. At very high concentrations, residence times of CH4 in the atmosphere can become much greater than the
nominal 10-year residence time that applies today. Nevertheless, it is likely that these concentrations reached several ppm during the PETM.
Greenhouse gas - Methane, Climate Change, Emissions: Methane (CH4) is the second most important greenhouse gas. CH4 is more potent than CO2 because the radiative forcing produced per molecule is greater. In addition, the infrared window is less saturated in the range of wavelengths of radiation...
www.britannica.com
comrade stalin
moscow
