These three graphics came from a blog by James Kennedy, a British chemistry teacher living in Australia. Here is his explanation for creating the posters:
As a Chemistry teacher, I want to erode the fear that many people have of “chemicals”, and demonstrate that nature evolves compounds, mechanisms and structures far more complicated and unpredictable than anything we can produce in the lab.
Right on Mr. Kennedy! Thank you for doing that.
I saw the posters, loved them, and emailed him to ask if I could put them on Sleuth4Health. I only wish I had a chemistry teacher like that during my schooling days. Please do visit his eclectic blog.