I don't know if this subject has been debated already, but I wonder how many commercial planes are flying all over the world at the same time ?
Let's say at noon at GMT time are any other time
how to calculate ?
On another forum someone answered that 260 000 pax (Discovery channel) would be in the air at the same time. If you count 100 pax/plane it makes
2600 planes in the sky at the same time...