Complex sentence: Each year it dumps a great pile of fruit and leaves on the ground to rot, but all of it goes back into nature to be reborn as new trees, bacteria, birds and other parts of the natural ecosystem.
Split into simpler sentences: Each year it dumps a great pile of fruit and leaves on the ground to rot. But all of this waste goes back into nature to be reborn as new trees, bacteria, birds and other parts of the natural ecosystem.