troposphere
/ˈtroʊpəˌsfɪr/
noun
- The lowest layer of Earth's atmosphere, extending from the surface up to about 6 to 12 miles (10 to 20 kilometers), where most weather occurs and where airplanes fly.
- The troposphere is where all the clouds, rain, and storms we experience happen.
- Commercial jets usually fly in the upper troposphere to avoid turbulence.
- Scientists study the troposphere to understand climate change and air pollution.