Scientists have measured big increases in the amount of methane, the powerful global warming gas, entering atmosphere since 2007.
Fracking, wetlands, cows = possible sources.
Fossil fuel production from shale gas operations in U.S. & Canada:
Causes of the rise are not fully understood. They may include increased emissions & perhaps decline in destruction of methane in the air.
Video explanation of this paper:
This August 2019 study points to fracking: https://www.sciencedaily.com/releases/2019/08/190814090610.htm …
See also this article from March 2019:
Regardless of what's behind the recent increase there are ways to reduce methane concentrations.
Humans account for as much as 60% of methane emissions, and nearly half of that may come from the fossil fuel industry. https://m.phys.org/news/2019-03-methane-atmosphere-surging-scientists.html …
Key anthropogenic CH4 emission sources:
Livestock (byproduct of digestion).
Oil and gas wells, pumping stations, pipelines, and refineries.
Rotting food waste in landfills.
Anaerobic lagoons of pig manure.
Exposed coal seams.
From May 2019:
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