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?

A population is defined as 

Which of the following is an example of a producer?

Which of the following is a human source of phosphorus that could contribute to the natural phosphorus cycle?

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?

Who was head of the U.S. Forest Service when Theodore Roosevelt was president?

Which of the following terms is used to describe elements with negative or positive charges due to having extra or missing electrons?

If an increase in rabbits also means an increase in the amount of bobcats, this is an example of a ____ feedback loop.

Give one of the three required parts of an Environmental Impact Statement (EIS) needed for any federal level  project.

More than one answer may be correct.  Please check all correct answers. To increase the effectiveness of exchange surfaces in the lungs and in the intestines, evolutionary pressures have