They provide valuable "free" services like producing oxygen, breaking down wastes, recycling nutrients for future food sources, and controlling floods and storm surges.
(They; provide; valuable "free" services like producing oxygen, breaking down wastes, recycling nutrients for future food sources, and controlling floods and storm surges) (storm; surges; )
They storm
provide surges
valuable "free" services like producing oxygen, breaking down wastes, recycling nutrients for future food sources, and controlling floods and storm surges