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stmbtwle

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Reply with quote  #21 
Here it is:
https://www.fws.gov/birds/bird-enthusiasts/threats-to-birds.php

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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay

colinmcc

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Reply with quote  #22 
Many thanks for the source URL, the picture I posted must have been a screen shot of that table/page. 

Growing up in the urban UK I was well aware that domestic cats are the biggest threat to wild bird populations, (a reason why I would never have one) [smile], and now living in Canada have seen horrific pictures of bird flocks in tar sand tailings pits etc.

I had however thought that slow moving blades of 'modern' wind turbines wouldn't be likely to cause significant kills, it would be interesting to know how many turbines there were in the study that produced the 174,000 figure, if for example, there were 174,000 turbines polled that would only be one bird per year per turbine.

Anyone have access to a world wide # of turbines estimate?
SolarInterested

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Reply with quote  #23 
Quote:
Originally Posted by stmbtwle
Here it is: https://www.fws.gov/birds/bird-enthusiasts/threats-to-birds.php
Thanks Willie and colimcc. I've bookmarked it for the next time this comes up.

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colinmcc

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Reply with quote  #24 
In answer to my own question, I found this figure 52,343, 'The number of wind turbines in the US at the end of 2016'. At:http://gwec.net/global-figures/wind-in-numbers/
On the assumption that double that number exist in the rest of the world, (an substantial under estimate I suspect), based on the table estimate that means approx 1 bird is killed by each wind turbine a year. 

Let's agree to ban cats before getting het-up about wind turbines! [wink]
SolarInterested

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Reply with quote  #25 
Back to the subject of solar roads - not much of a surprise here:

Solar panels replaced tarmac on a motorway. Here are the results.
Several factors work against this oddly popular idea.

(link)

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Both temperature rise and airflow are integral to comparing hot air collectors
stmbtwle

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Reply with quote  #26 
Admittedly those are test projects which are always expensive, but considering the conditions they're expected to endure, I don't see how they can ever be practical.  


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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
KevinH

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Reply with quote  #27 
The article also points out the available area of roads versus the much larger available area of rooftops where the efficiency is higher.

Kevin H
MN



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