Increased RF radiation inside a vehicle!
Proof Of Faraday Effect!
Because most vehicles have metal roofs and largely come with
factory tinted glass, your vehicle can act as a concentrating
reflector, amplifying RF density like a microwave oven, not
letting the RF radiation escape through the metal body and
tinted glass. You must use an RF Safe approved antenna kit or
car kit to wave guide (transport) the RF Radiation outside the
vehicle to prevent amplification of the
microwave effect
See
metal enclosure usage
Currents
Flowing On A Vehicle With Antenna Located Inside The Vehicle
Near-Fields
Inside An Automobile With Antenna In Rear View Mirror 
Currents
Flowing On A Person With An Antenna Located Inside The
Vehicle 
