Introducing the topic
www.epa.gov/kids/you.htm
http://kids.niehs.nih.gov/recycle.htm
Recycle City Website
www.epa.gov/recyclecity/mainmap.htm
Dictionary & Search engines
www.wordreference.es
www.google.es
www.yahoo.es
Vocabulary related to Environment
http://www.saberingles.com.ar/lists/environment.html
http://esl.about.com/library/vocabulary/blwordgroups_environment.htm