Another ground stop out of LGA -LaGuardia NY airport due to smoke

[Tink3815]

News is reporting this morning flight delays due to smoke from Canadian wild fires. What is the difference between fog and smoke when it cones to landing and taking off? Wondering if it's not for the ground crews working outside in hazard conditions.

 

[EACarlson]

engine performance degradation due to reduced oxygen, increased particulates that cause damage to the engine, and LaGuardia doesn't due all that great in fog either due to the crowded airspace.

 

[sam_gordon]

Fog is nothing but water. Smoke has all kinds of particles in it.

 

[Donald Duck Family]

It is primarily the particulate matter in the smoke that is the real concern.