In the research study by Nicole Eikenberry and Chery Smith, the primary focus is on food insecurity and food waste. They specifically surveyed individuals who faced challenges in affording food and examined the ways in which people accessed food, including the consumption of discarded food.
What is not studied in this research includes global warming and political conflict. While food insecurity and food waste can have indirect relationships with broader issues like global warming and political conflict, these topics are not the central focus or subjects of the study conducted by Eikenberry and Smith.