Because the fuselage will be more rigid and better absorb landing stresses
Most air planes are pressurized, because at high altitudes, the air pressure is less than humans can handle, which causes us to black out. Bad vacation when your pilot blacks out at 30,000 feet!
RUNWAY
No because the air around the plane has pressure. If two planes take off at the same time the planes will crash. The planes might crash if they land at the same time.
Because the planes are not pressurized. No need to pressurize an airplane flying at such a low altitude. Once a plane reaches around 12,000 feet it becomes necessary to pressurize the cabin.
Planes can land on airfields normally. Specifically on a runway. However some planes can land on water. FloAt planes for example. Others can land on snow if they equipped with skis and still other may land on unprepared surfaces like tundra when they are equipped with big tires that prevent them from sinking into the muck. There are many formal and informal airports around the world both on land, water and the stuff in between.
Planes cannot land straight up and down
A float plane is a type of seaplane. Float planes land on extended floats like a normal airplanes landing gear, as opposed to boat-hulled sea planes. Float planes are usually land airplanes which have been converted to land on water, although some aircraft are specially designed for this purpose. Some aircraft like the Cessna Caravan are available in float-plane configuration straight from the factory, but most float-planes are modified land-planes. Float planes may or may not have the ability to extend wheels from their floats to land on land. It is a common feature, but not all float planes are so equipped.
the atmosphere extends far beyond the tallest mountain but the closer to space you get, the thinner it gets...this is why planes need to be pressurized
it is made of gas and there is no ground also because the air is too pressurized
No airplanes can land in an airport. They land on the runway.
Pontoon planes
In Jeddah Saudi Arabia