Where do experts argue about topics? That depends on who the experts are and what audience they are addressing.
Before you choose a database to search, ask whose voice do you want to hear...a medical doctor? An environmental scientist? A farmer? Choose your database accordingly.
It is worthwhile to search the press to see the debates and discussions that journalists are writing about. One job of a journalist is to keep abreast of the latest in scientific and academic study then interpret that literature for a general audience.
