Tolerance.ca
Director / Editor: Victor Teboul, Ph.D.
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Independent and neutral with regard to all political and religious orientations, Tolerance.ca® aims to promote awareness of the major democratic principles on which tolerance is based.

Bird droppings were a foundation of modern agriculture and American empire

By Edward D. Melillo, William R. Kenan, Jr. Professor of History and Environmental Studies, Amherst College
Long before synthetic fertilizers, the global guano trade reshaped farming, fueled American expansion and exposed the hidden human costs of feeding the modern world.The Conversation


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