I didn't see a chord based version of this song, 
so i decided to hack a really simple version that sounds okay when playing along with the song, 
Email me @ Brianrankin@live.com if you have any questions :)

D                                                        G
When there's a burning in your heart
                 D                                  G
An endless yearning in your heart
           D                                    
Build it bigger than the sun
                  G
Let it grow, let it grow
                       D                                G
When there's a burning in your heart
                            D
Don't be alarmed

ETC, once you get the rhythm down it's easy as pie. The chorus carries the same rhythm

BRIDGE 

Am
And if you feel just like a tourist in the city you were born
Gm
Then it's time to go
Am
And define your destination
                                                             G (changes to major) 
There's so many different places to call home

etc etc

Hope this is okay, i might update it later if i figure out a better sounding way! cheers.