New paper contends that carbon dioxide causes less than 50% of the greenhouse effect
'The paper distinguishes between forcing and feedback impacts of water vapour & contends that it is the primary forcing agent, at much more than 50% of total GHG gas effect. That means that controlling atmospheric CO2 is unlikely to be an effective 'control knob' as claimed by Lacis et al.(2010)' -- 'There is no statistically significant evidence to show that increases in anthropogenic GHGs account for any, let alone 'most,' of observed global temperature change'
