>> 1. You're standing in a 40 microtesla magnetic field right now.
> 
>   Can you charge a laptop with a 40 mecrotesla magnetic field?

Unlikely.

>> 2. You're surrounded by devices that produce far stronger magnetic fields.
> 
>   But far stronger than the suggested form of wireless energy transmission?

The document referenced (and similar reports I've seen) don't actually 
go into just "how strong" this field actually is. Presumably it's quite 
a bit more than 40 microtesla, but that's all I could tell you.

>> 3. Medical imaging scanners often generate fields of up to 3 T, yet show 
>> no known negative effects on human health.
> 
>   They do so for relatively short periods of time, and humans are exposed
> to them once of twice. They are not generated for hours every single day
> with the same person present at all times.

How about the machine operator?

The magnet in an NMR machine is essentially a permanent magnet - you 
don't "turn it on" just to do the scan, and then turn it off again. It 
takes several days to charge up, and a similar time to shut it down 
properly.

[You can actually buy 3 T magnets that fit in your pocket. The challenge 
for an NMR machine is to make a field that's 3 T *all over*, or at least 
in a space big enough to fit a person inside...]

>> 4. According to known physics, most physical materials are very weakly 
>> affected my magnets.
> 
>   Yet a strong enough magnetic field can kill a human. (Sure, it has to
> be staggeringly strong, but it's possible.)

Really? That's news...

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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