[Carry_Okie]

Depends upon what is in the dust, especially if said dust is loaded with Pseudomonas syringae ESC 10 or 11. Animals incubate it in their cud. Their treading on fresh grass incubates it on bruised plant tissue and spreads it. As a sheath bacterium, it is UV resistant. It exudes one of the most powerful surfactants known to science that is extremely attractive to water. It is a proven and powerful bio-aerosol in droplet nucleation.

Yes, grazing can modify climate for good or ill on a continental scale, depending upon how it is done or not.

[Ernest_at_the_Beach]

First time I have heard of it:

Pseudomonas syringae strain ESC-11 (006451) Fact Sheet

And 10 also

****************************EXCERPR******************************************

Summary

These two strains of naturally occurring bacteria are extremely similar in their composition and characteristics. They are used for preventing various fungal diseases that occur after harvest on apples, pears, and certain citrus fruits. Based on extensive testing and the methods used in applying the bacteria to the fruit, these bacterial strains are not expected to harm either humans or the environment when used in pesticide products. Furthermore, these fungicides have the potential to decrease the use of other, more toxic fungicides that they may replace.