<human>:  What are the pros and cons of vegetarianism?
<bot>: 
Pros:
 • Reduced risk of heart disease
 • Reduced risk of obesity
 • Reduced risk of certain types of cancer
 • Reduced environmental impact
 • Usually cheaper than a diet containing meat

Cons:
• Possibility of nutrient deficiencies
 • Difficulty obtaining sufficient protein
 • Vitamin B12 deficiency in some cases
 • Difficulty adhering to the diet
 • Potential for monotonous meals and lack of variety