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dropping. 40 gigahertz and above, you might have attenuation of signals by way of either small or greater absorption of EH, F, and UH, F. It might experience effects when small becomes more thick. Emergency responders have sometimes reported disruption of line of sight communication and heavy smoke. Wildfire plumes, they provide what's referred to as a dielectric material for a dielectric or a lens effect where its permittivity becomes influence, this is the plume, it's permittivity because it's influenced by the type of quality and temperature. And there's a plume height, and a plume is radio subrifractive, and that's spread to, I mean it's spread to radio waves. Wildfire combustion, it's really an incomplete process, just dropping.