Remember, you want to challenge your assumptions by using diverse sources. However, you can do searches in Nexis and Factiva to find out who has said what before on a topic. Just change the keywords to fit your topic:
Nexis Search:
alternative w/2 energ! w/10 (expert or authority or professor or fellow) w/30 (said or says)
Factiva Search:
alternative near2 energ* near10 (expert or authority or professor or fellow) near30 (said or says)