The provided pie charts delineate the distribution of energy consumption within the average Australian household, alongside the corresponding greenhouse gas emissions generated from such energy use.
It is evident that heating and water heating are predominant in both energy usage and greenhouse gas emissions. In particular, while the two categories significantly contribute to both metrics, discrepancies arise in the contributions from other appliances and cooling.
In terms of energy consumption, heating constitutes 42% of the total usage in an average Australian household, followed closely by water heating, which comprises another 30%. Together, these two facets account for 72% of the entire energy consumption. Notably, refrigeration and lighting represent smaller proportions at 7% and 4%, respectively, while cooling is the least utilized, comprising only 2% of total energy consumption. This stark contrast highlights the primary focus on heating and water heating in Australian households.
When examining greenhouse gas emissions, water heating emerges as the most significant contributor, accounting for 32% of emissions. Other appliances follow as the second biggest source, responsible for 28% of the total emissions, despite using merely 15% of the household energy. Conversely, heating and refrigeration account for smaller emission percentages of 15% and 14%, respectively. Interestingly, both lighting and cooling produce more greenhouse emissions than their energy usage would suggest, with lighting contributing 8% of emissions and cooling 3%, thereby underscoring the complex relationship between energy consumption and environmental impact.