<
https://theconversation.com/urban-trees-cool-the-worlds-cities-more-than-we-thought-but-we-cant-rely-on-them-alone-281866>
"Cities and towns are usually 1–3°C hotter than the surrounding countryside,
because asphalt, concrete and brick absorb heat from the sun and radiate it
slowly. Some cities can be as much as 7°C hotter. This effect is known as the
urban heat island.
This can be dangerous, especially in hot countries. In very hot conditions,
dehydration and heat exhaustion become real risks. If it gets too hot, it can
be lethal.
There’s one simple antidote: urban trees. Authorities around the world have
planted more trees to counteract the heat.
But how effective is this? How much hotter would our cities be without trees?
To find out, we analysed data from nearly 9,000 cities around the world, home
to about 3.6 billion people. As our new research shows, trees almost halve how
much heat is trapped by the urban heat island effect.
This cooling is welcome. But it is far from even. Wealthier, suburban and humid
cities have more trees on average."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
