Try the catalog's subject headings to help you find relevant books.

For general books on visual rhetoric:

• Visual communication
• Visual perception
• Visual literacy
• Rhetoric
• Advertising campaigns

For health topics:

• Communication in public health
• Health promotion

For environmental problems, try: 

• Communication in the environment.

Using the word "aspects" can also sometimes help you differentiate facets of a topic in your search.  For example:

• Social aspects
• Psychological aspects
• Health aspects