Troposphere (noun)

The lowest layer of the Earth"s atmosphere, extending from the surface up to about 8-20 kilometers, characterized by weather and temperature changes, and where most of the Earth"s weather occurs.

Origin:

The word "troposphere" comes from the greek words "tropos" meaning "turn" and "sphaira" meaning "sphere", referring to the lowermost layer of the earth"s atmosphere which is characterized by weather and temperature changes and where most of the earth"s weather occurs.

Examples:

1. The air pollution is mainly present in the troposphere.
2. The majority of the Earth's weather phenomena take place in the troposphere.
3. The troposphere is the layer of the atmosphere where the majority of the Earth's weather takes place.
4. The temperature in the troposphere decreases with altitude.
5. Troposphere is the layer of the atmosphere where commercial air traffic takes place.