Team captures a day in the life of the whole world

New research estimates what a day in the life of the world looks like.

The global population of 8 billion people, each of whom has 24 hours, adds up to approximately 190 billion human hours per day. How we spend those hours determines our effects on our surroundings as well as our experiences of life.

“At present, we are struggling to come to terms with global challenges, and that calls for fresh perspectives on how the world works,” says Eric Galbraith, a professor in earth system science at McGill University and the senior author of a study in the Proceedings of the National Academy of Sciences.

“If we are to sustainably navigate climate change and biodiversity loss, adapt to rapid technological change, and achieve global development goals, it is crucial to understand the big picture of how the global human system functions, so that we can see where there is potential for change.”

“We wanted to know—what does the time allocation of humanity look like, averaged over all people and across all countries?” adds William Fajzel, a PhD student in earth system science and the first author of the study. “In other words, if the world were a single average person, what would their day look like?”

To find out, the research team looked at time use and labor data from 2000 to 2019 (to avoid any effects of the COVID-19 pandemic) from over 140 countries (representing 87% of the world’s population).

The researchers categorized all the things people do in a waking day, including both work and non-work activities, according to the purpose of the activity. They used 24 categories that fall into three broad groups:

• Intended to alter the external world (including the provision or modification of food, energy, buildings, the maintenance of surroundings, etc.)
• Focused directly on human minds or bodies (including caring for the cleanliness, appearance, mood, and health of self and others, as well as education, religion, hobbies, socializing, sports, media, resting, etc.)
• Organizing activities within society (such as transportation, trade, finance, law and governance, etc.)

They then manually classified nearly 4,000 unique activities and made some surprising discoveries:

• The researchers found that the single largest chunk of time goes towards activities that are human-centered—a little more than 9 hours. Sleep or being in bed accounts for an additional 9 hours (the global estimate includes youth who tend to sleep longer hours).
• Of the remaining 6 hours, growing and collecting our food, preparing it, commuting, and moving around, and allocational tasks (such as trade, finance, sales, law, governance, policing) each occupy around 1 hour.
• Waste management accounted for just 1 min of the global day, in stark contrast to the 45 minutes spent tidying and maintaining our dwellings. All infrastructure and building construction takes place in about 15 minutes.

Surprisingly, time spent in activities like meals, daily travel, hygiene and grooming, and food preparation don’t change in a systematic way with the material wealth of a population. In contrast, the time spent growing and collecting food varied strongly with wealth, from over 1 hour in low-income countries to less than 5 minutes in high-income countries.

Since the study includes both economic and non-economic activities, a portion of the total time in each of the categories described above represents people engaged in economic activity—e.g., doctors and nurses, cooks, and agricultural laborers, etc.

The team estimates that the entire global economy occupies around 2.6 hours of the average human day. Agriculture and livestock production dominate this economic activity, followed by allocational activities like trade, finance and law, and manufacturing.

While the total of 2.6 hours may seem small, for the two-thirds of the world’s working-age population (ages 15-64) who make up the labor force this equates to about a 40-hour work week.

The results of the study indicate how economic activities fit into the overall fabric of human life at a global scale. They also suggest that there is plenty of scope to shift time allocation around certain activities, such as extracting materials, provisioning energy, and dealing with wastes, all accomplished within about seven minutes.

Source: McGill University

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