The following sections of this BookRags Literature Study Guide is offprint from Gale's For Students Series: Presenting Analysis, Context, and Criticism on Commonly Studied Works: Introduction, Author Biography, Plot Summary, Characters, Themes, Style, Historical Context, Critical Overview, Criticism and Critical Essays, Media Adaptations, Topics for Further Study, Compare & Contrast, What Do I Read Next?, For Further Study, and Sources.
(c)1998-2002; (c)2002 by Gale. Gale is an imprint of The Gale Group, Inc., a division of Thomson Learning, Inc. Gale and Design and Thomson Learning are trademarks used herein under license.
The following sections, if they exist, are offprint from Beacham's Encyclopedia of Popular Fiction: "Social Concerns", "Thematic Overview", "Techniques", "Literary Precedents", "Key Questions", "Related Titles", "Adaptations", "Related Web Sites". (c)1994-2005, by Walton Beacham.
The following sections, if they exist, are offprint from Beacham's Guide to Literature for Young Adults: "About the Author", "Overview", "Setting", "Literary Qualities", "Social Sensitivity", "Topics for Discussion", "Ideas for Reports and Papers". (c)1994-2005, by Walton Beacham.
All other sections in this Literature Study Guide are owned and copyrighted by BookRags, Inc.
Radiation of the sun including ultraviolet A (UV-A, 320-400 nanometers) and ultraviolet B (UV-B, 280-320 nanometers). Exposure to UV-A radiation, which is utilized in tanning booths, damages dermal elastic tissue and the lens of the eye, and causes cancer in hairless mice. Exposure to UV-B induces breaks and other mutations in DNA and is associated with basal and squamous cell carcinoma as well as melanoma. The ozone layer of the earth's atmosphere provides protection from ultraviolet radiation, but this protective layer is becoming depleted due to the release of chlorofluorocarbons and other causes.