Final answer:
Dietz-Uhler & Lanter (2009) conducted a systematic review analyzing the environmental impacts of human diets. The study compared various aspects of the studies and reviews, such as design, duration, diets, and outcomes.
Step-by-step explanation:
The study conducted by Dietz-Uhler & Lanter in 2009 focused on analyzing the environmental impacts of human diets. They conducted a systematic review based on 16 published studies and 18 published reviews, with most of the studies being done in the United States or Europe. The study compared the design, intervention, duration, diets, quality assessment, and main outcomes of the studies, along with the diets, quality assessment, and main outcomes of the reviews.