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Recent climate change suggests a global warming trend. the most likely cause could be an increase in which gas?

Atmospheric methane

Radiative forcing

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The recent global warming trend is primarily attributed to the increase in Carbon Dioxide (CO2) levels, as indicated by various studies. Research shows that the rise in CO2 concentrations, mainly driven by anthropogenic activities, has a significant positive feedback effect on global mean surface air temperature anomalies (GMTA) . The Intergovernmental Panel on Climate Change (IPCC) also highlights the substantial impact of anthropogenic greenhouse gases (GHGs), particularly CO2, on the observed global temperature rise . Additionally, studies suggest that the increase in methane (CH4) levels, particularly from sources like shale gas production, has contributed significantly to global climate change . However, the dominant role in recent climate change, leading to the global warming trend, is attributed to the increase in CO2 levels.

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Posted Content•DOI Recent methane trends derived from S5P/TROPOMI data Oliver Schneising, John P. Burrows, Matthias Buschmann, Michael Buchwitz, gwaynebthm - Show less +4 more 15 May 2023	Recent methane trends, as indicated in the paper, show an increase in methane (CH4) levels, contributing to global warming due to its greenhouse effect, making it a likely cause.
Open access•Posted Content•DOI Is Shale Gas a Major Driver of Recent Increase in Global Atmospheric Methane Robert W. Howarth 23 Apr 2019-Biogeosciences Discussions 11 Citations	Shale gas emissions are likely the leading cause of the recent increase in atmospheric methane, contributing significantly to global climate change trends.
Proceedings Article•DOI Global climate change: Analyzing anthropogenic warming and causality Adolf Stips, D. Macias, C. Coughlan, Elisa Garcia-Gorriz - Show less +3 more 18 May 2015 2 Citations	Recent climate change indicates global warming primarily caused by an increase in CO2 levels. The positive feedback from CO2 leads to a stronger rise in global temperatures.
Open access Carbon dioxide is not the primary cause of global warming Allan M. R. MacRae 01 Jan 2010 1 Citations	Carbon dioxide (CO2) is the most likely cause of recent global warming trends, as indicated by the IPCC's 2007 report attributing significant warming to anthropogenic greenhouse gas emissions.

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