I listened to the song, and this is what I believe to be the correct way of playing it.-
This without a capo, unlike the capo 5 versions i've seen elsewhere.

Chorus:

Em (022000@1)                 C (x32010@1)    D (xx0232@1)    EmGo (022000@1)make a dff'rence, we can make a diff'rence

G (320003@1)                         Bm7Go (x20202@1)make a diff'rence in the world

Em (022000@1)                 C (x32010@1)    D (xx0232@1)    EmGo (022000@1)make a diff'rence we can make a diff'rence

C (x32010@1)       D (xx0232@1)               EmGo (022000@1)make a diff'rence in the world

First Verse:

Em (022000@1)                                    C (x32010@1)     D (xx0232@1)    EmWe (022000@1)are the salt in the earth, called to let the people see

    G (320003@1)                    Bm7The (x20202@1)love of God in you and me

           Em (022000@1)                          C (x32010@1)     D (xx0232@1)    EmWe (022000@1)are the light of the world, not to be hidden, but be seen

C (x32010@1)       D (xx0232@1)               EmGo (022000@1)make a diff'rence in the world


----Chorus----

Second Verse:

Em (022000@1)                                 C (x32010@1)    D (xx0232@1)      EmWe (022000@1)are the hands of Christ, reaching out to those in need

    G (320003@1)                    Bm7The (x20202@1)face of God for all to see

           Em (022000@1)               C (x32010@1)     D (xx0232@1)      EmWe (022000@1)are the spirit of hope, we are the voice of peace

C (x32010@1) D (xx0232@1) Em (022000@1)