The formulas to calculate oxygen production and consumption are:
Oxygen produced by one tree over its lifetime:
\[ \text{Oxygen_produced_per_tree} = \text{tree_oxygen_per_year} \times \text{tree_lifespan} \]
Oxygen consumed by one human over their lifetime:
\[ \text{Oxygen_consumed_per_human} = \text{human_oxygen_per_day} \times 365 \times \text{human_lifespan} \]
Oxygen Production: The total amount of oxygen produced by trees over their lifetimes.
On average, a tree makes 100,000 liters of O2 per year. With the 100-year lifespan of trees, this usually means a tree over its lifetime makes 10,000,000 liters of O2. For 20 million trees, this is 200,000,000,000,000 liters.
Oxygen Consumption: The total amount of oxygen consumed by humans over their lifetimes.
An average human breathes in 550 liters of O2 per day, or 200,750 liters per year. Over the 71.33 years a human lives, this gives 14,322,997.5 liters of O2. Multiply that by 31,646 people, and we get 453,359,348,535 liters.
Let's assume the following values:
Step 1: Calculate the total oxygen produced by 20 million trees:
\[ \text{Total_Oxygen_Produced} = 20,000,000 \times (100,000 \times 100) = 200,000,000,000,000 \text{ liters} \]
Step 2: Calculate the total oxygen consumed by 31,646 people:
\[ \text{Total_Oxygen_Consumed} = 31,646 \times (550 \times 365 \times 71.33) = 453,359,348,535 \text{ liters} \]