Tom: Eb 


the only guitar in the song is in the chorus, with the progression being 
Eb , F# , C 
 

i.e. 
    Eb                       F#     C 
    Do you want to save the world? Don't recycle. 
 
you can also play guitar in the verses - 
C# , Eb , F# , C# 
 

i.e. 
    C#    
    I met a member of generation x siad what's in with you  
 
    kids these days. I'm so old that I've probably never  
                                                  Eb  F# 
    have heard of it, and he replied purple haze. 
    C# 
    Purple haze!
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