What causes air turbulence?
Fox News
Turbulence is essentially unstable air that moves unpredictably. While it is often associated with storms, clear-air turbulence, which is invisible, is the most dangerous type.
Such incidents are usually minor, and carriers have made steady improvements to reduce accident rates over time, but experts maintain that air travelers should stay vigilant — stressing the importance of wearing a seat belt whenever possible as a first line of protection.
AP explains the essentials to understand about turbulence.
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