[meteorite-list] Green Glowing Meteorites?

[David Gunning]

Hi All,

While checking-out available video footage of meteor falls I notice there
appears to be a green colored glow emitting from the front of some 
meteors.  Is this due to air pollution or is there another possible cause
such as a chemical composition of particularly green glowing meteors
being the likely cause?

Too basic a question?  Pardon my asking.

Thanks.

Dave Gunning