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When describing the parts of a biogeochemical cycle the term “sink” refers to  

In biogeochemical cycles the word fixation refers to changing matter/atoms 

 A niche can be defined as 

What are the four most common elements found in living organisms?

The type of system in which energy and matter can enter and exit is called a(n) _____ system.

Which of the following key factors of Agenda 21 is considered to be the central idea that if solved could also solve other issues addressed by the Agenda?

Which type of environmentalism is most concerned with saving ecological areas for moral and aesthetic reasons?

Which policy or law requires an environmental impact statement (EIS) for every major federal project having a significant impact on the quality of the human environment?

Explain what a keystone species is by giving a definition and an example.

The judicial branch of the United States government is primarily involved in interpreting law and deciding if laws have been broken.  However the judicial branch is important in environmental policy because ________________ can be used to stop activities such as pollution that could harm the environment.