I assume we all know burning brush, trees, and such is natural, as are the byproducts. Long before humans, things burned until fuel ran out or the rains came. "Pollution"? Burning tires, plastics, chemicals, etc., that aren't naturally occurring and the byproducts is different. As long as I don't live near a long-term burn pit, idc. Brush burning of cleared land for building (i.e. one-off burns), shrug.
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