The panels of the illustrated book have buttons beneath,
as follows:
![[Previous]](https://webarchive.library.unt.edu/eot2008/20090510221141im_/http://www.epa.gov/ozone/graphics/prev2.gif) |
will take you back one panel.
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![[Return]](https://webarchive.library.unt.edu/eot2008/20090510221141im_/http://www.epa.gov/ozone/graphics/return2.gif) |
will bring you back to this page.
|
![[Next]](https://webarchive.library.unt.edu/eot2008/20090510221141im_/http://www.epa.gov/ozone/graphics/next2.gif) |
will take you to the next panel.
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When you see a panel with red
text, you can click on the text to take you to more detailed
information. Note that these links are often to parts of the web
site that are more advanced than the information in the book itself.
Use your browser's back button to return to the book.
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