Comment by amluto

Comment by amluto 10 months ago

Not just conifers. In Los Angeles, liquidambar trees are planted all over for autumn color, and it turns out that they’re an enormous contributor to smog formation.

hinkley 10 months ago

And male trees upping pm because they’re lonely and looking for love.

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amluto 10 months ago

To be fair, those are large particles, which are neither as dangerous nor as persistent as smaller particles. Unless you’re allergic to them, of course.

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- hinkley 10 months ago
  
  PM2.5 is the really nasty carcinogenic stuff, but pollen size overlaps substantially with other forms of soot and IIRC is a double digit percentage of poor urban air quality. It’s somewhere around fourth or fifth largest source.
  
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