Looks a lot like vegetation to me...

Nov 26, 2020
7:42:19am

PortlandCoug Intervention Needed

Perhaps where trees grow there are just more people/towns compared to the open plains or valleys and deserts of the west?

This message has been modified

Originally posted on Nov 26, 2020 at 7:42:19am

Message modified by PortlandCoug on Nov 26, 2020 at 7:44:43am

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PortlandCoug

Bio page: PortlandCoug
Joined: Mar 5, 2001
Last login: May 3, 2024
Total posts: 21,478 (54 FO)

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Messages

Author

Time

What drives the sharp line in light pollution?

Xenon

11/26/20 7:38am

Everything directly west of that line is farmland and has been for a long time

Magathisll

11/26/20 7:40am

Yep. The line goes thru a bunch of major cities and then nothing after that but

WDaddy

11/26/20 7:58am

Great Plains maybe?

John Doe

11/26/20 7:42am

Looks a lot like vegetation to me...

PortlandCoug

11/26/20 7:42am

RE: What drives the sharp line in light pollution?

BIG XII Coug

11/26/20 7:45am

Grazing vs farming

Busiturtle

11/26/20 7:51am

Turns out people live to the right of that line and not to the left

Yiowa

11/26/20 7:57am

It is interesting how everybody just stopped at about the same distance from the coast. A sociological component?

Dr MoBYU

11/26/20 8:01am

Annual rainfall line. West of the line represents where rainfall alone can’t

valleus

11/26/20 8:06am

My hunch is historically this was a factor

Busiturtle

11/26/20 8:15am

Google “annual precipitation map” and it correlates nicely along the vertical.

valleus

11/26/20 8:07am

YEP, my HCBW just showed me that map too.... interesting!!

Xenon

11/26/20 8:35am

Turns out water is kind of important to civilization

Tare

11/26/20 8:42am

people?

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