Statement 1 is Correct: The lower stratosphere is extremely dry and contains very little water vapor or dust. Consequently, it is almost entirely free of clouds and weather-related phenomena, which provides jet pilots with clear visibility and a stable environment.

Statement 2 is Correct: In the stratosphere, temperature increases with altitude (temperature inversion), which creates a very stable atmospheric layer. This stability prevents the formation of strong vertical winds or convective currents, which are the primary cause of turbulence in the troposphere, thus allowing for a smoother flight.