If you are struggling to determine or narrow down your topic, Gale Virtual Reference Library (GVRL) has a cool exploratory feature called "Topic Finder." You can get to the Topic Finder in two ways:
1. 
Enter your topic as a search term in the box along the top of the screen and navigate to the bottom of the menu along the right side of your results list. You will see a part of the menu called "Analyze." Selecting "Topic Finder" will open up the Topic Finder with your search term already entered.
2. 
You can select "Advanced" just to the right of the search box. From the Advanced Search screen, select "Topic Finder" from the three tabs towards the top of the screen. From here, enter your search term or whatever topic you'd like to explore!
The Topic Finder will default to "Tile" view, but you can change this to "Wheel" view. Click on a tile or section of the wheel to explore reference articles related to your initial search term and the term on the tile you have selected. Those results will appear on the right half of the screen. Some tiles will be grouped together into larger sections of tiles. Clicking on one of those will allow you to see the individual tiles in that group. Choose "Reset" at the top of the Topic Finder to go back to the full view. Below is an example for the search term "Pollution."
The words that appear in each tile are words that appear frequently with the search term you entered. You might notice some strange tiles (such as Ltd. in the example for Pollution above), but Gale's Topic Finder can be a useful way to visualize and connect to other topics related to the one you searched.