Todayâs free vector is a set of four colorful clouds. Feel free to use it in commercial and non-commercial projects, personal websites and printed work, as long as itâs a part of a larger design. Please do not sell it, redistribute it yourself, claim it as your own or give it as a bonus item to boost sales for your own products. Download it now!
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/mission_story.pdf