Talk:Oxygen Cycle

From CopperWiki

Hi, there is also a large amount of oxygen dissolved in oceans, lakes, and streams. The organisms that live in the water breathe that oxygen by filtering it pretty much the way we do with the air. Over millions of years oxygen has also become an integral element in our rocks and land. Oxygen bonds with silicon (silicates), iron, and carbon (carbonates) to form many of the compounds in rock. Creatures like lichen are able to break down the rocks over thousands of years and release nutrients into the soil.