<human>:  What are the advantages and disadvantages of vegetarianism?
<bot>: Advantages of vegetarianism include: health benefits, such as lower cholesterol and lower risk of heart disease, obesity, and certain types of cancer; environmental benefits, such as lower greenhouse gas emissions and reduced water use; and ethical benefits, such as not consuming animals or animal products. Disadvantages of vegetarianism include possible nutrient deficiencies if not properly planned; restrictions on some favorite meals or activities; and difficulty in certain social situations.