Why 'dragon of clouds' forms above wildfires
As wildfires rage across the western US, scientists report the "most extreme" fire clouds they have seen.
from BBC News - World https://ift.tt/2U1a81q
https://ift.tt/2U1a81q
from BBC News - World https://ift.tt/2U1a81q
https://ift.tt/2U1a81q
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