Comment by amluto

Comment by amluto 2 days ago

3 replies

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 2 days ago

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

  • amluto 2 days 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.

    • hinkley 2 days 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.