Ecosystems #6

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the continuous movement of water between Earth’s surface and the air, changing from liquid to gas to liquid.

The continuous exchange of carbon dioxide and oxygen among living things.

Any of various needle-leaved or scale-leaved, chiefly evergreen, cone-bearing trees or shrubs, such as pines, spruces, and firs.

Where fresh water mixes with salt water

to make worse, harm

pertaining to conifer trees

slightly salty, as in the mixture of river water and sea water in estuaries

The continuous trapping of nitrogen gas into compounds in the soil and its return to the air.