http://www.helium.com/knowledge/222345-science-fair-project-ideas-effects-of-plastic-on-the-environment.xml Helium.com > High School Math & Sciences > Science fair project ideas: Effects of plastic on the environment en-us Copyright Helium.com Mon, 16 Mar 2009 11:20:06 GMT Mon, 16 Mar 2009 11:20:06 GMT