You can improve your health and do your part for the environment by going veggie. Researchers from California looked at the diets of 34,000 people of which around half were vegetarians. They found that meaty diets required 2.9 times more water, 2.5 times more energy, 13 times more fertiliser and 1.4 times more pesticides than the vegetarian diets. Lead author Dr Hal Marlow said “Almost everyone has some knowledge that it costs less environmentally or is healthier to be a vegetarian, but there’s no understanding yet of really what that means until you put some numbers behind it.”
Marlow et al., 2009. Diet and the environment: does what you eat matter? American Journal of Clinical Nutrition. 89 (5) 1699S-1703S.