Hi!
This is maybe not the right group, but anyhow...
I spend my last vacation in Utah, and I observed something very odd:
The land in Utah is mostly desert (or plains or something) with a
vegetation that is arid (that is: small, gray plants, if any).
But near roads, (a stripe about two feet broad), this changes:
the plants become green, larger and simply more. But they are the same
plants (probably only better watered)
The question: Why?
If suspect something like:
1) While buliding the road, the soil was improved somehow.
or
2) Exhaust gases from cars contain watersteam which then condensates.
or
3) asphalt and normal desert-soil have different warmth-keeping (???)
factors, and at night the micro-climate changes somehow.
So what is the reason (proably nothing of the above).
As you may have noticed, I know (almost) nothing about biology or physics.
so keep it simple.
Thanks, Sven.
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