I know some of you have asked me where to find reliable arguments in favor and against our topics.
I cannot do this for you. It's part of the effort to find it yourself. So, I'm going to help you help yourself:
1- Make a PHI Paper Folder with FOR and AGAINST points
2- Type: "Fast food, arguments in favor" and then "fast food, arguments against" in your google search bar.
3- Narrow the search by typing "fast food, .org" and "fast food, .edu" you get a more specialized more reliable kind of aggregation.
After you look for .org and .edu articles, look for magazines like The Economist, The Atlantic, National Review, The New Yorker, Scientific American, or reputed newspapers like New York Times, Washington Post, LA Times, CNN, etc.
So, in the FOR subfolder I find:
this (from The New Yorker),
this (from The Atlantic, discussing the issues)
this (with the best 7 Fast Food restaurants)
this, (at fastfoodnutrition.org)
Now you would do the same now with the AGAINST subfolder.
Another option is google scholar
If you have three article in each file, you have plenty to start, then as your discussion gets more interesting, you may want to search in more detail. For example, suppose you are talking about a particular issue, like obesity. I typed for a more specific search: "fast food, obesity, .edu". I got 15 M articles!
this Princeton study on the effects of Fast Food on obesity.
If you don't find the topics it's because you are not doing a good search. Believe me, the topics are out there!