22 November 2018

“The science is clear. Without rapid cuts in CO2 and other greenhouse gases, climate change will have increasingly destructive and irreversible impacts on life on Earth. The window of opportunity for action is almost closed,” said World Meteorological Organization (WMO) Secretary-General Petteri Taalas.

The WMO Greenhouse Gas Bulletin shows that global concentrations of carbon dioxide (CO2), methane and nitrous oxide have been increasing steadily over the past years. In addition, the report notes a resurgence of a potent greenhouse gas and ozone-depleting substance called CFC-11, which is regulated under an international agreement to protect the ozone layer.
 
The WMO Greenhouse Gas Bulletin reports specifically on atmospheric concentrations of greenhouse gases, which are what remains in the atmosphere, following a complex process of emissions and absorptions.