On 29/11/2010 13:51, alan.b.pearce@stfc.ac.uk wrote:
> http://www.dw-world.de/dw/article/0,,6266327,00.html
>
> Claims that wifi radiation is killing trees ... !!!

Doesn't deserve Tech tag

<< "The most relevant study we've found so far was undertaken by a Swiss=20
federal institute on forestry," van der Graaf told Deutsche Welle.=20
"Their study looked at spruce and beech trees under a more extended=20
range of densities than in the Dutch study, and under normal conditions,=20
they found no harmful consequences for the plants."

Only when the radiation was increased beyond legal levels did the plants=20
incur damage - through heat and thermal effects, van der Graaf added.>>

  ** My Dodgy Science Detector went off.

<< In the pilot study commissioned by Alphen aan den Rijn, 20 plants=20
were placed in one of two climate chambers. One chamber had no wireless=20
access points, and the other did; only in the chamber with wireless=20
points did the tree leaves show the necrosis described above. >>


So 10 plants only per chamber?

Only two chambers?

Was it blind testing? Did the person evaluating growth know which=20
chamber was "live"
Did they rule out disease?

Is it a statistically meaningful sample for the type and quantity of plant?

I hope it was their own money they spent on this poor research.

--=20
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