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

Tags: media, clip_art, public_domain, image, svg, epa, epa_sunwise, ozone, ozone_layer, earth, global, warming, globe, world, sun, summer, science, colouring_book, outline, line_art, cartoon, epa, epa_sunwise, ozone, ozone_layer, earth, global, warming, globe, world, sun, summer, science, colouring_book, outline, line_art, cartoon