From the UNLV Libraries Quick Search (on the library home page), limit your search to BOOKS & try a variety of keywords, such as:
controversy and environment
controversy and science
controversy and rhetoric
Research and advocacy institutes are often known as "think tanks". A think tank is an organization that conducts research and advocates in areas such as social policy. Think tank reports are another useful way to pursue research on policy issues.
Search across many think tanks/research institutes:
Here are a few selected national think tanks/research institutes that work in areas relevant to social welfare: