While methane may have a much shorter life than C02, it is much more damaging. NASA has provided the attached visual indicator of world wide methane emissions on this hot link: excuse the Ad at the front end …
A new United Nations report says:
If human-caused methane emissions are cut by nearly in half by 2030, a half degree (0.3 degrees Celsius) of warming can be prevented by mid-century, according to Thursday’s report by the United Nations Environment Program.
The report said the methane reduction would be relatively inexpensive and could be achieved – by plugging leaks in pipelines, stopping venting of natural gas during energy drilling, capturing gas from landfills and reducing methane from belching livestock and other agricultural sources, which is the biggest challenge.
Because methane helps make smog, cutting annual emissions of the gas by 45 per cent (or nearly 180 million metric tons) could potentially prevent about 250,000 deaths a year worldwide from pollution-triggered health problems, the U.N. said.
Andersen said without both methane and carbon dioxide reductions the world cannot achieve the goals in the 2015 Paris climate agreement. Study lead author Drew Shindell, a Duke University Earth sciences professor, said recent acceleration of methane pollution “is really taking us far, far off” the Paris goals.
Note that methane is not always being measured and reported on by C02 measuring stations.