Summary:
- The troposphere is the lowest and most important layer of the atmosphere.
- All of Earth’s weather takes place in the troposphere.
- The troposphere gets some of its heat directly from the Sun.
- Most, however, comes from Earth's surface.
- The surface is heated by the Sun and radiates back into the air.
- This makes the temperature higher near the surface than at higher altitudes.
- An inversion can trap air pollution near thesurface.
- A temperature inversion is when air is cooler close to the ground than it is above.