The unlikely treasure off Peru's coast: bird guano - SFGate

SFGate
The unlikely treasure off Peru's coast: bird guano
SFGate
LIMA, Peru - Bird droppings are a nuisance for most people, but in Peru they have been a closely guarded treasure since pre-Columbian times. Guano, a gentler word for dung, is one of the few words in English derived from Quechua, the language of the ...