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 :)

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

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

BRIDGE 

Dm
And if you feel just like a tourist in the city you were born
Cm
Then it's time to go
Dm
And define your destination
                                                             C (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.

来源：www.ultimate-guitar.com