Do Lon­don plane trees ac­tu­ally ab­sorb pol­lu­tion into their bark?

BBC Earth (Asia) - - Q&A -

They don’t ab­sorb it, but pol­lu­tion par­ti­cles do get stuck to the bark and trapped in the hairs on the leaves. A 2011 study es­ti­mated that ev­ery year, trees in Greater Lon­don re­move 850 to 2,000 tonnes of PM10 pol­lu­tion par­ti­cles, which are the type con­sid­ered harm­ful to hu­mans. Plane trees do emit iso­prene though, which com­bines with ni­trous ox­ide in car ex­haust emis­sions to pro­duce harm­ful ozone. Luck­ily, this only reaches dan­ger­ous lev­els in tem­per­a­tures above 30°C, which are rare in the UK. LV

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