We in wildfire country commonly refer to "limbing" (or "limb up a tree") as removing growth in the lower part of the trees to protect against the spread of wildfires/decrease likelihood of crown fires.
I use "limbing" to differentiate my meaning from "pruning," which I would describe as trimming branches for the health of the tree and/or for training it to grow in a certain way.
I think your regional location could determine the context for this one, which may make it ambiguous.
I can report that, although I am close to an active wildfire, we are not under evacuation orders yet, and the wind(at this time) seems to be pushing the fire away from us.
We do have a friend who runs a permaculture CSA farm, and, due to the evacuations, has not been able to care for his crops.
I don't know if this is biologically accurate, but it seems to make sense to me:
Avoid growing leaf-centric produce in favor of fruiting or root crops - any gaseous or sooty emissions that would enter through the leaf systems would have to travel through the entire plant(and hence be partially filtered/remediated) before getting to the part of the plant you would eat?