References
- http://yoursciencecenter.org/?attachment_id=1200
- http://www.sciencekids.co.nz/sciencefacts/recycling.html
- http://www.runnymede.gov.uk/portal/site/recycling/menuitem.96d415886e623e09fb7d93afaf8ca028/
- epa.gov/epaoswer/osw/kids/index.htm
- http://www.benefits-of-recycling.com/recyclingforkids
- Google Images
- http://web.mit.edu/facilities/environmental/recyc-facts.html