Occasionally there are temporary problems accessing databases off-campus. If it happens, there are several options to solve this problem:
Most databases require that you combine words in your search with AND or OR. AND retrieves records with all words. OR retrieves records with any of the words.
mercury pollution AND coal
mercury pollution OR mercury accumulation
nuclear AND computer* AND (reliability OR dependability)
The asterisk (*) truncates a word so that for this example, either computer or computers has to be in the records.