Estimation: well over 100,000.
35000 as of 2006
There are about 51,200 all together
Almost every country in the world now has airplanes.
a lot
i think why they use airplanes toprotect them
Airplanes have NOT become "negative impacts on the world" - what foolish talk have you been listening to.
by a lot
In the whole world
Airplanes just changed world wide trade? Oh boy.
Some airplanes are made in the US, but not all. there are several other countries int he World that can make airplanes too.
There is no exact number of cities in the world, as it depends on the definition of a city and can vary between countries. However, it is estimated that there are thousands of cities globally.
There was no one main airplane. Each country developed a number of airplanes throughout the war.