Sure, I can provide a more specific answer.

Assuming you are asking about the amount of oxygen required for one person during the fastest mode of transport currently available, which is commercial air travel, the answer is roughly 0.84 kilograms (or 840 grams) of oxygen per hour.

During commercial air travel, the cabin is pressurized to simulate an altitude of about 6,000 to 8,000 feet (1828 to 2438 meters) above sea level. At this altitude, the air pressure is lower, and the concentration of oxygen in the air is also lower (about 21% as opposed to the 20.9% at sea level). As a result, the human body needs to consume more oxygen to maintain normal bodily functions.

The exact amount of oxygen required by an individual during air travel varies depending on several factors, including age, gender, weight, and overall health. However, a rough estimate is that an average person requires about 0.84 kilograms of oxygen per hour during commercial air travel.

It's worth noting that airlines typically provide sufficient oxygen for passengers and crew members during flights, and the oxygen levels in the cabin are constantly monitored to ensure that they remain within safe limits.
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