A. Portion of air
B. Portion of water
C. Lowest layer of atmosphere where we survive
D. Portion of sky
The lowest region of the atmosphere, extending from the earth’s surface to a height of about 6–10 km (the lower boundary of the stratosphere).
A. Portion of air
B. Portion of water
C. Lowest layer of atmosphere where we survive
D. Portion of sky
The lowest region of the atmosphere, extending from the earth’s surface to a height of about 6–10 km (the lower boundary of the stratosphere).