But once it falls to the earth as rain or snow and begins its journey to your home, water starts collecting impurities.
(it; falls; to the earth) (it; begins; its journey to your home) (water; starts; T:once it falls to the earth as rain or snow and begins its journey to your home)
it it water
falls begins starts
to the earth
its journey to your home
T:once it falls to the earth as rain or snow and begins its journey to your home