The document reports on record levels of greenhouse gases in the atmosphere in 2018 according to the World Meteorological Organization. It notes that carbon dioxide levels increased 147% since pre-industrial levels, methane 259%, and nitrous oxide 123%. These increases exacerbate climate change by raising temperatures and increasing extreme weather. The WMO secretary-general warns that humanity's future is at stake and calls on governments to do more to transition away from fossil fuels in line with the Paris Agreement.