"Personal Health; New Research on the Vegetarian Diet", in The New York Times (12 October 1983) http://www.nytimes.com/1983/10/12/garden/personal-health-new-research-on-the-vegetarian-diet.html
“Those who claim to care about the wellbeing of human beings and the preservation of our environment should become vegetarians for that reason alone. They would thereby increase the amount of grain available to feed people elsewhere, reduce pollution, save water and energy, and cease contributing to the clearing of forests; moreover, since a vegetarian diet is cheaper than one based on meat dishes, they would have more money available to devote to famine relief, population control, or whatever social or political cause they thought most urgent. … when nonvegetarians say that “human problems come first” I cannot help wondering what exactly it is that they are doing for human beings that compels them to continue to support the wasteful, ruthless exploitation of farm animals.”
Source: Animal Liberation: A New Ethics for our Treatment of Animals (1975), Ch. 6: Speciesism Today
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Peter Singer 54
Australian philosopher 1946Related quotes
Judaism and Vegetarianism (revised edition, New York: Lantern Books, 2001), pp. 181 https://archive.org/stream/JudaismAndVegetarianism#page/n205/mode/2up-182.
Which Way Lies Hope? An Examination of Capitalism, Communism, Socialism and Gandhiji's Programme (Ahmedabad: Navajivan Publishing House, 1952), p. 8 https://archive.org/stream/in.ernet.dli.2015.54786/2015.54786.Which-Way-Lies-Hope#page/n15/mode/2up.

Animal Rights: Moral Theory and Practice https://books.google.it/books?id=bFYYDAAAQBAJ&pg=PA0 (Palgrave Macmillan, 2nd ed. 2009), pp. 164-165.

Source: The World We Have: A Buddhist Approach to Peace and Ecology
Source: Animals Matter: A Biologist Explains Why We Should Treat Animals with Compassion and Respect

"Kim Sharma: New vegan on the block" https://web.archive.org/web/20140113154535/http://articles.timesofindia.indiatimes.com/2009-08-12/news-interviews/28205180_1_vegetarian-diet-kim-sharma-bollywood-stars, The Times of India (12 August 2009).

Mi stupisco, quando vedo gente giovane mangiare carne. Mi sembra talmente cosa d'altre epoche! La gioventù carnivora non è coi tempi, ha uno stomaco da secolo XIX, che carnivorizzò l'Europa... Cibarsi di pezzi di animali macellati è un'anomalia, fuori della dieta vegetariana non c'è giovinezza vera. La carne è per lo più un'angosciata abitudine dei vecchi. Richiedere piatti di carne, parlarne, ricordarli è cosa da vecchi, e da vecchi incapaci di svecchiarsi con una dieta decisamente alternativa.
Insects without Borders: Thoughts of the Unknown Philosopher (Insetti senza frontiere: Pensieri del filosofo ignoto), Milan: Adelphi, 2009, § 34.

Tolstoy and His Message (New York: Funk and Wagnall's Company, 1904), p. 53 https://archive.org/stream/tolstoyhismessa00cros#page/52.