Since the beginning of time, people have gradually consumed more and more energy alongside technology advancements. Consumption was initially around 3 kWh per day per person and was mostly used for nourishment. Because of the necessity and possibility of heating for warmth, consumption in prehistoric times rose to 6 kWh primary energy per day.
In the Middle Ages, people in Europe wore more clothes and created more elaborate houses and churches, increasing the daily energy consumption to 24 kWh. Today, we use less than 6 kWh for pure nourishment, with more than 12 kWh for the preparation and transportation of food. US and German citizens consumed in 2020 about 202 and 110 kWh per day, respectively.
The 2020 data on energy consumption
and population (PRB) show that the average daily energy consumption
of a person in India is still just 18 kWh. But China at 77 kWh is already above the world average and will
consume approximately the same amount of energy as industrial nations in the next few decades.
In 2020, the world primary energy consumption was 71,4 GJ per person for a world population of about 7.7 billion people.
It means a world average consumption of primary energy of 58 kWh per day per person.
If the world population increases to 10 billion as expected, and all countries advance to match the present consumption of US, the world energy demand will eventually increase nearly fivefold.