I can attest to this as when I was out in the strong breeze, I sneezed like crazy.

 Thanks to Channel 6 for this:

March 28, 2007 – Several South Jersey fire departments received calls from people seeing what they thought was smoke in the forest.

As it turned out, what they were seeing was pollen flying off trees.

Just touching the branches of a Red Cedar tree unleashed a thick cloud of pollen. When the wind is strong enough and the cloud is big enough, it easily be mistaken for smoke

Between 7 and 9:30 Wednesday morning a dozen 9-1-1 brush fire calls were reported, mostly in Gloucester and Atlantic counties. Malaga Fire Company responded three times, but in each case fire was not the cause. It was pollen smoke.