an image from the US government EPA "Sunwise" program. I converted it from PDF format, and removed all the "sunwise" logos. the source link is here - http://www.epa.gov/sunwise/doc/guide.pdf

Tags: media, clip_art, externalsource, public_domain, image, svg, epa, epa_sunwise, book, pen, school, read, write, epa, epa_sunwise, book, pen, school, read, write