Fall 2011 issue
Letters to the Editor
Here’s the beef…
Re: Consumer Guide, Spring/Summer 2011
Regarding the article on page 38 of the Spring-Summer Alumni Gazette (“Five ways to make your footprint smaller”) there is a statement that cannot go unchallenged. Namely, that it takes 100,000 litres of water to produce a kilogram of beef. Assuming that a yearling steer dresses out at 200 kg, that would require 20 million litres of water or 54,794 litres per day!
This is about 180 times the gross weight of the steer. Even assuming that three-quarters of the water is used in irrigation and at the packing plant, this is still a ludicrous figure.
Marlow et al. at Loma Linda University (a staunch advocate of vegetarianism) did a comprehensive study based on 11 vegetarian foodstuffs and found that the average nonvegetarian diet consumed 2.9 times more water than the vegetarian one (American Journal of Clinical Nutrition 2009; 89: 1699S). This is a much more believable figure. Care must be taken in matters such as this as figures can be widely quoted and used to promote other agendas.
Dr. R.B. Philp , DVM, PhD
Professor Emeritus , Physiology & Pharmacology