WMO World Meteorological Organization [to 21 November 2015]
https://www.wmo.int/media/?q=news

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Greenhouse Gas Concentrations Hit Yet Another Record
9 November 2015
Interaction between CO2 and water vapour amplifies warming
Geneva 9 November 2015 (WMO) The amount of greenhouse gases in the atmosphere reached yet another new record high in 2014, continuing a relentless rise which is fuelling climate change and will make the planet more dangerous and inhospitable for future generations.

The World Meteorological Organization’s Greenhouse Gas Bulletin says that between 1990 and 2014 there was a 36% increase in radiative forcing – the warming effect on our climate – because of long-lived greenhouse gases such as carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) from industrial, agricultural and domestic activities….