Tom: Eb5 


the only guitar in the song is in the chorus, with the progression being 
Eb5 , F#5 , C5 
 

i.e. 
    Eb5                       F#5     C5 
    Do you want to save the world? Don't recycle. 
 
you can also play guitar in the verses - 
C#5 , Eb5 , F#5 , C#5 
 

i.e. 
    C#5    
    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  
                                                  Eb5  F#5 
    have heard of it, and he replied purple haze. 
    C#5 
    Purple haze!