Advertisement for guano (aka the excrement of sea birds that live off of the Pacific coast of South
Advertisement for guano (aka the excrement of sea birds that live off of the Pacific coast of South America), 19th century. Guano was a miracle fertilizer that allowed huge increases in the global food supply and an increase in population. The guano islands off of Chile and Peru were mined heavily and eventually guano was replaced as a fertilizer by artificial fertilizer created though the Haber-Bosch process. -- source link
#history#farming#poop#environmental history