1. Energy consumption in households. (n.d.)https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Energy_consumption_in_households#Use_of_energy_products_in_households_by_purpose
2. Natural Resources Canada Residential Sector—Energy Use Analysis. (n.d.)https://oee.nrcan.gc.ca/corporate/statistics/neud/dpa/showTable.cfm?type=AN§or=res&juris=00&rn=12&page=0
3. Costs of clean heating in China: Evidence from rural households in the Beijing-Tianjin-Hebei region
4. US Energy Information Administration Energy use in homes. (n.d.).https://www.eia.gov/energyexplained/use-of-energy/homes.php
5. US CO2 emissions from energy consumption by source and sector 2020. (n.d.).https://eia.gov/todayinenergy/detail.php?id=48856