The amount of energy the United States uses each year to power air conditioning units is about the same amount of energy consumed by the entire continent of Africa.
Two thirds of homes in the United States have air conditioners. All of these air conditioners add up to using about 5% of the electricity consumption in the United States and costs more than $11,000,000,000 (yes that is billions of dollars) to homeowners.
The United States has always consumed more energy for air conditioning than the rest of the world. We use some much energy staying cool, that we consume more energy just for cooling than the entire continent of Africa (which has roughly a billion people).