1. Courtney Beamer Dr. Simpson APES 27 March 2012 http://yoursinfo.com/list-of-online-english- dictionary-sites

2.  The average weather that occurs within a given region over a long period of time http://www.nasa.gov/mission_pages/noaa- n/climate/climate_weather.html

3.  Recycling a product into the same product http://www.japanfs.org/en/pages/028732.h tml

4.  A system in which matter and energy exchange do not occur across boundaries http://www.treehugger.com/about-treehugger/dumb-question-dept- if-earth-is-a-closed-system-and-were-running-out-of-water-wheres-it- all-going.html

5.  Solid fuel formed primarily from the remains of trees, ferns, and other plant materials preserved 280 million to 360 million years ago http://204.69.112.31/cgi- bin/blockpage.cgi?ws-session=786081327

6.  The use of a single fuel to generate heat and produce electricity http://www.energiestro.com/us/us_cogenera tion.htm

7.  A power plant that uses both exhaust gases and steam turbines to generate electricity http://www.combinedcyclepowerplants.com/

8.  A strategy for pollution control that involves regulation and enforcement mechanisms http://blog.christianitytoday.com/ctpolitics/2 011/04/effort_to_curta.html

9.  A relationship between species in which one species benefits and the other species is neither harmed nor helped http://www.webersarmy.com/symbiosiswebq uest/Commensalism.htm

10.  An energy source that is bought and sold http://www.fypower.org/com/

11.  All of the populations of organisms in a given area http://dynamicecosys1.wikispaces.com/Components+of+ecosyst ems