The average person exhales between 0.7 and 1 kilogram of carbon dioxide (CO2) per day:

 The average person exhales between 0.7 and 1 kilogram of carbon dioxide (CO2) per day: 

Calculation: Based on the assumption that a person breathes in 0.5 liters of air 16 times per hour for 24 hours, the average person exhales 0.7 to 0.9 kilograms of CO2 per day. 

Factors that affect the amount of CO2 exhaled: The amount of CO2 exhaled varies depending on physical activity level. 

Although humans exhale CO2, it's part of a natural cycle that doesn't add extra CO2 to the atmosphere. Our bodies convert carbohydrates from plants into energy, water, and CO2. In contrast, burning fossil fuels releases CO2 that's been trapped for millions of years, which contributes to global warming.