The carbon greenhouse gases (CO₂, CH₄ and CO) were proven to have a large impact on the global carbon cycle and our climate. To understand the variability of the carbon cycle and predict future climate change scenarios, we need to study the processes that drive the changes of these gases in the atmosphere. We study the sources and sinks of CO₂, CH₄ and CO with a combination of measurements and chemical transport modelling to identify missing, underestimated or overestimated sources in Australia.