One of these will be AC, since climate change comes with higher temperatures many people will start needed more cooling systems, so this results in more air conditioning and newer models of cooling systems. Although more people are living in cities which can result in shortages, cities actually emit less carbon than rural areas since house sizes are smaller, more gas heat over propane is used, less carbon fueled transportation is used, and more people share communal spaces such as laundry rooms and kitchens. While cities create some problems, it is important to realize that the denser population creates less carbon emissions which benefits climate change.[17][18]