The first pie chart illustrates the energy usage of Australian families, while the second pie chart shows the percentage of greenhouse gas emission is emitted

The first pie chart illustrates the energy usage of Australian families, while the second pie chart shows the percentage of greenhouse gas emission is emitted. Overall, heating accounts for the highest energy consumption and the largest proportion of CO2 emitted belongs to water-heating. According to given data, heating is the most common choice of Australians, at 42%, followed by that of water-heating at approximate 30%. Refrigeration consumed 7% of total energy consumption in an Australian household, which is larger than that required for cooling and lightening. Finally, the figure for other appliances makes up merely 15% which represented a half of water-heating. In terms of greenhouse gases released, water-heating contributed to the highest percentage, which is 32% respectively. In comparison, the data for heating and refrigeration are lower, standing at about 15% each. Both cooling and lighting are the lowest figures when compared with other fields. The other appliances allocated 28% and account for over a quarter of the produced greenhouse gases.