Under US law, certain companies are required to file with the US Securities & Exchange Commission (SEC) a report that describes their efforts to responsibly source tin, tantalum, tungsten and gold (3TG) from the Democratic Republic of the Congo (DRC) and surrounding countries - called a "Conflict Minerals Report". If a company's Conflict Minerals Report also covers other minerals this would be a good sign that they take the issue seriously and are willing to go beyond the legal requirements. 

This metric is asking whether the company's Conflict Minerals Report covers copper.