Worldwide fertiliser shortage prompts Peru to turn to bird poo

The Russian invasion of Ukraine has made the South American country's deposits of bird poo more valuable

As countries around the world wrestle with shortages of imported fertiliser as a result of the Russian invasion of Ukraine, Peru has turned to a tried and tested alternative: bird poo.

In the 19th century, fortunes were made and lost on guano, the potent excrement of fish-eating seabirds which was harvested by enslaved people from Africa and indentured Indigenous and Chinese labourers.