Question

there is air till a height of about km from the earth​

Answer 1

Answer:

It extends from earth's surface to an average height of about 12km...

Answer 2

There is a wind up to a kilometre long from the earth is:

• The exosphere is the outer layer of the Earth's atmosphere (i.e. the upper limit of space).

• It extends from exobase, located at the top of the thermosphere at an altitude of 700 km above sea level, to about 10,000 km (6,200 mi; 33,000,000 ft.).

• Where it meets the wind of the sun.

• Air is a mixture of several gases and covers the earth in all directions.

• The atmosphere is called the atmosphere.

• In general, the atmosphere reaches 1600 km from the surface of the earth.

• However, 99% of the mass of the universe is complete at altitude of 32 kilometres from the earth's surface.