By the same principle, if 10x as many burgers are cooked without propane than with propane, then your question is completely irrelevant. Given that propane is

By the same principle, if 10x as many burgers are cooked without propane than with propane, then your question is completely irrelevant. Given that propane is about 5% of US home's primary heating fuel whereas electricity and natural gas together are 80%, that seems likely: https://www.eia.gov/todayinenergy/detail.php?id=18131 https://www.eia.gov/todayinenergy/detail.php?id=18131