Final answer:
Vegans choose a plant-based diet for ethical, health, and environmental reasons. A vegan diet has positive effects on the environment by reducing the demand for animal agriculture and its associated negative impacts.
Step-by-step explanation:
Vegans choose to follow a plant-based diet for various reasons, including ethical concerns about animal welfare, health benefits, and environmental impact. By eliminating animal products from their diet, vegans reduce the demand for animal agriculture, which is a major contributor to deforestation, water pollution, and greenhouse gas emissions. Adopting a vegan diet can help preserve biodiversity, reduce land and resource use, and mitigate climate change.
Research has shown that vegan diets can be healthful and nutritionally adequate, as plants provide all the essential amino acids needed for protein synthesis. Vegans can obtain protein from a variety of plant-based sources such as legumes, tofu, tempeh, seitan, quinoa, and nuts. Combining different plant foods throughout the day can ensure a complete protein intake.