1.  Once in your groups, you will be divided further into teams of 2.  One team will research how pollution affects humans.  The other will discover how it affects animals.  
2.  These are resources for the researchers of humans:

http://www.ventura.org/rma/envhealth/
http://seawifs.gsfc.nasa.gov/OCEAN_PLANET/HTML/peril_sewage.html
http://library.thinkquest.org/CR0215471/ocean_pollution.htm

     These are resources for the animal researchers:
http://seawifs.gsfc.nasa.gov/OCEAN_PLANET/HTML/peril_marine_debris.html
http://library.thinkquest.org/CR0215471/oil_spills.htm
http://www.waterencyclopedia.com/Po-Re/Pollution-of-the-Ocean-by-Plastic-and-Trash.html

3.  Once research has been collected about the effects of ocean pollution on humans and animals, the group will together create a PowerPoint that could be used to convince the people in your town to stop water pollution.  This should include how pollution impacts animals/humans and what can be done to help.  You should offer the townspeople suggestions on how to cut back on water pollution.