Take a deep breath
We all need air, but how much of it do 7 billion people consume?People breathe at different rates, depending on their age, sex, fitness level and what they're doing at the time. In broad strokes, though, the average person breathes about8 litres of air every minute while at rest, or about 11,520 litres a day.
So the world's population inhales at least 80,640,000,000,000 (80.6 trillion) litresof air a day, and converts more than 3,850,000,000,000 (3.85 trillion) litresof oxygen to carbon dioxide.
A University of California study determined that the average person breathes about 52 litres a minute when running, so if the entire world went jogging together for an hour we'd breathe about 21,840,000,000,000 (21.8 trillion) litres of air.
One hectare of average forest creates about enough oxygen to support 19 people, according to the U.S. Forest Service. Using that as the benchmark, the world's population needs at least 368,421,052 hectares of forested land to provide us with the air we need – an area roughly 650 times the size of PEI and 5 times the size of Manitoba.