The given chart illustrates the proportions of household energy usage in different areas and the corresponding greenhouse gas emissions for each activity.
It can be seen that heating, water heating, and other appliances constitute the majority of household energy usage at 42%, 30%, and 15%, respectively. Similarly, these activities are also the top three sources of greenhouse gas emissions, though other appliances emit more greenhouse gases compared to heating.
While heating accounts for the largest proportion of household energy usage at 42%, its emissions drop to 15%. In contrast, other appliances have nearly double the emissions at 28% despite only accounting for 15% of energy usage. Water heating maintains a consistent level, with 30% of energy usage and 32% of greenhouse gas emissions.
The remaining household energy usage comprises activities such as cooling, lighting, and refrigeration, which together account for 13% of energy usage and 25% of greenhouse gas emissions. Notably, refrigeration emits 14% of greenhouse gases compared to its 7% energy usage, and lighting emits 8% while only using 4% of energy.