While human-caused greenhouse gas emissions are responsible for the bulk of the increase in CO2 levels, Australia's bushfires have made the problem measurably worse, underscoring the impact of the catastrophe on the global climate system.
"There is no sign of a slowdown, let alone a decline, in the concentration of greenhouse gases in the atmosphere, despite all the commitments under the Paris Agreement on Climate Change," WMO Secretary-General Petteri Taalas, said.
Australia's Bureau of Meteorology (BOM) says the drought is being driven, in part, by warmer sea-surface temperatures impacting rainfall patterns. Air temperatures have also warmed over the past century, increasing the ferocity of droughts and fires.