Sources have to be cited in the actual paragraphs using a sentence.

Is a vegan diet healthier than an omnivorous diet?
A plant base diet is healthier than an omnivorous diet.
I. Research has shown that a plant-based diet reduces global mortality and increases longevity.
A. According to Marco Springmann. Analysis and Evaluation of the Health and Climate Change Cobenefits of Dietary Change, results show a 12% overall mortality reduction among vegans.
B. In an article by Norris R.D, Jack. “Disease Rates of Vegetarians and Vegans.” Disease Rates, he claims diseases linked to animal-sourced products tend to be 30% lower in people who do not consume meat.

II. Promoting plant-based diets will increase valuable agriculture and natural resources worldwide.
A. According to a PETA research “Meat and the Environment,”
60% of the world’s land has been converted into agricultural space to raise cattle in order to sustain the growing population.
B. As stated in an article published in The New York Times by Bittman, Mark “Rethinking the Meat-Guzzler,” 14% of the world’s population suffers from malnourishment and be increased if the population eliminated meat products from their diets.

III. Vegan diets improve mood and stress.
A. Bonnie L Beezhold claims in his case study published in Nutrition Journal, “Vegetarian Diets Are Associated With Healthy Mood States: A Cross-Sectional Study in Seventh Day Adventist adults,” 60 of 107 vegan participants reported lower negative emotions.
B. As specified by the U.S National Institute of Health “Vegan Diets Lower Anxiety and Stress,” 51% of vegans and 28% of omnivores recruited for this research, indicated less mood disturbance in a six-month period proving that plant-based diets positively impact stress.